/
minmax-fold.ll
1465 lines (1322 loc) · 49 KB
/
minmax-fold.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
; This is the canonical form for a type-changing min/max.
define i64 @t1(i32 %a) {
; CHECK-LABEL: @t1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP3:%.*]] = sext i32 [[TMP2]] to i64
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp slt i32 %a, 5
%2 = select i1 %1, i32 %a, i32 5
%3 = sext i32 %2 to i64
ret i64 %3
}
; Check this is converted into canonical form, as above.
define i64 @t2(i32 %a) {
; CHECK-LABEL: @t2(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 5
; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[NARROW]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp slt i32 %a, 5
%2 = sext i32 %a to i64
%3 = select i1 %1, i64 %2, i64 5
ret i64 %3
}
; Same as @t2, with flipped operands and zext instead of sext.
define i64 @t3(i32 %a) {
; CHECK-LABEL: @t3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[A:%.*]], 5
; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[NARROW]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp ult i32 %a, 5
%2 = zext i32 %a to i64
%3 = select i1 %1, i64 5, i64 %2
ret i64 %3
}
; Same again, with trunc.
define i32 @t4(i64 %a) {
; CHECK-LABEL: @t4(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 [[A:%.*]], 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 [[A]], i64 5
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT: ret i32 [[TMP3]]
;
%1 = icmp slt i64 %a, 5
%2 = trunc i64 %a to i32
%3 = select i1 %1, i32 %2, i32 5
ret i32 %3
}
; Same as @t3, but with mismatched signedness between icmp and zext.
define i64 @t5(i32 %a) {
; CHECK-LABEL: @t5(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[A:%.*]], 5
; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[NARROW]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp slt i32 %a, 5
%2 = zext i32 %a to i64
%3 = select i1 %1, i64 5, i64 %2
ret i64 %3
}
define float @t6(i32 %a) {
; CHECK-LABEL: @t6(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = sitofp i32 [[TMP2]] to float
; CHECK-NEXT: ret float [[TMP3]]
;
%1 = icmp slt i32 %a, 0
%2 = select i1 %1, i32 %a, i32 0
%3 = sitofp i32 %2 to float
ret float %3
}
define i16 @t7(i32 %a) {
; CHECK-LABEL: @t7(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], -32768
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 -32768
; CHECK-NEXT: [[TMP3:%.*]] = trunc i32 [[TMP2]] to i16
; CHECK-NEXT: ret i16 [[TMP3]]
;
%1 = icmp slt i32 %a, -32768
%2 = trunc i32 %a to i16
%3 = select i1 %1, i16 %2, i16 -32768
ret i16 %3
}
; Just check for no infinite loop. InstSimplify liked to
; "simplify" -32767 by removing all the sign bits,
; which led to a canonicalization fight between different
; parts of instcombine.
define i32 @t8(i64 %a, i32 %b) {
; CHECK-LABEL: @t8(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 [[A:%.*]], -32767
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 [[A]], i64 -32767
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT: [[TMP4:%.*]] = icmp slt i32 [[B:%.*]], 42
; CHECK-NEXT: [[TMP5:%.*]] = select i1 [[TMP4]], i32 42, i32 [[TMP3]]
; CHECK-NEXT: [[TMP6:%.*]] = icmp ne i32 [[TMP5]], [[B]]
; CHECK-NEXT: [[TMP7:%.*]] = zext i1 [[TMP6]] to i32
; CHECK-NEXT: ret i32 [[TMP7]]
;
%1 = icmp slt i64 %a, -32767
%2 = select i1 %1, i64 %a, i64 -32767
%3 = trunc i64 %2 to i32
%4 = icmp slt i32 %b, 42
%5 = select i1 %4, i32 42, i32 %3
%6 = icmp ne i32 %5, %b
%7 = zext i1 %6 to i32
ret i32 %7
}
; Ensure this doesn't get converted to a min/max.
define i64 @t9(i32 %a) {
; CHECK-LABEL: @t9(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[A:%.*]], -1
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[A]] to i64
; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[TMP1]], i64 [[TMP2]], i64 4294967295
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp sgt i32 %a, -1
%2 = sext i32 %a to i64
%3 = select i1 %1, i64 %2, i64 4294967295
ret i64 %3
}
define float @t10(i32 %x) {
; CHECK-LABEL: @t10(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], 255
; CHECK-NEXT: [[R1:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP2:%.*]] = sitofp i32 [[R1]] to float
; CHECK-NEXT: ret float [[TMP2]]
;
%f_x = sitofp i32 %x to float
%cmp = icmp sgt i32 %x, 255
%r = select i1 %cmp, float %f_x, float 255.0
ret float %r
}
define float @t11(i64 %x) {
; CHECK-LABEL: @t11(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i64 [[X:%.*]], 255
; CHECK-NEXT: [[R1:%.*]] = select i1 [[TMP1]], i64 [[X]], i64 255
; CHECK-NEXT: [[TMP2:%.*]] = sitofp i64 [[R1]] to float
; CHECK-NEXT: ret float [[TMP2]]
;
%f_x = sitofp i64 %x to float
%cmp = icmp sgt i64 %x, 255
%r = select i1 %cmp, float %f_x, float 255.0
ret float %r
}
; Reuse the first 2 bitcasts as the select operands.
define <4 x i32> @bitcasts_fcmp_1(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_fcmp_1(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> [[A:%.*]] to <4 x float>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> [[B:%.*]] to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fcmp olt <4 x float> [[T1]], [[T0]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T0]], <4 x float> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x float> [[TMP1]] to <4 x i32>
; CHECK-NEXT: ret <4 x i32> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x float>
%t1 = bitcast <2 x i64> %b to <4 x float>
%t2 = fcmp olt <4 x float> %t1, %t0
%t3 = bitcast <2 x i64> %a to <4 x i32>
%t4 = bitcast <2 x i64> %b to <4 x i32>
%t5 = select <4 x i1> %t2, <4 x i32> %t3, <4 x i32> %t4
ret <4 x i32> %t5
}
; Switch cmp operand order.
define <4 x i32> @bitcasts_fcmp_2(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_fcmp_2(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> [[A:%.*]] to <4 x float>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> [[B:%.*]] to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fcmp olt <4 x float> [[T0]], [[T1]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T0]], <4 x float> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x float> [[TMP1]] to <4 x i32>
; CHECK-NEXT: ret <4 x i32> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x float>
%t1 = bitcast <2 x i64> %b to <4 x float>
%t2 = fcmp olt <4 x float> %t0, %t1
%t3 = bitcast <2 x i64> %a to <4 x i32>
%t4 = bitcast <2 x i64> %b to <4 x i32>
%t5 = select <4 x i1> %t2, <4 x i32> %t3, <4 x i32> %t4
ret <4 x i32> %t5
}
; Integer cmp should have the same transforms.
define <4 x float> @bitcasts_icmp(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_icmp(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> [[A:%.*]] to <4 x i32>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> [[B:%.*]] to <4 x i32>
; CHECK-NEXT: [[T2:%.*]] = icmp slt <4 x i32> [[T1]], [[T0]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x i32> [[T0]], <4 x i32> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x i32> [[TMP1]] to <4 x float>
; CHECK-NEXT: ret <4 x float> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x i32>
%t1 = bitcast <2 x i64> %b to <4 x i32>
%t2 = icmp slt <4 x i32> %t1, %t0
%t3 = bitcast <2 x i64> %a to <4 x float>
%t4 = bitcast <2 x i64> %b to <4 x float>
%t5 = select <4 x i1> %t2, <4 x float> %t3, <4 x float> %t4
ret <4 x float> %t5
}
; SMIN(SMIN(X, 11), 92) -> SMIN(X, 11)
define i32 @test68(i32 %x) {
; CHECK-LABEL: @test68(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 11
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 11
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp slt i32 11, %x
%cond = select i1 %cmp, i32 11, i32 %x
%cmp3 = icmp slt i32 92, %cond
%retval = select i1 %cmp3, i32 92, i32 %cond
ret i32 %retval
}
define <2 x i32> @test68vec(<2 x i32> %x) {
; CHECK-LABEL: @test68vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 11, i32 11>
; CHECK-NEXT: [[COND:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 11, i32 11>
; CHECK-NEXT: ret <2 x i32> [[COND]]
;
%cmp = icmp slt <2 x i32> <i32 11, i32 11>, %x
%cond = select <2 x i1> %cmp, <2 x i32> <i32 11, i32 11>, <2 x i32> %x
%cmp3 = icmp slt <2 x i32> <i32 92, i32 92>, %cond
%retval = select <2 x i1> %cmp3, <2 x i32> <i32 92, i32 92>, <2 x i32> %cond
ret <2 x i32> %retval
}
; MIN(MIN(X, 24), 83) -> MIN(X, 24)
define i32 @test69(i32 %x) {
; CHECK-LABEL: @test69(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 24
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 24
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 24, %x
%cond = select i1 %cmp, i32 24, i32 %x
%cmp3 = icmp ult i32 83, %cond
%retval = select i1 %cmp3, i32 83, i32 %cond
ret i32 %retval
}
; SMAX(SMAX(X, 75), 36) -> SMAX(X, 75)
define i32 @test70(i32 %x) {
; CHECK-LABEL: @test70(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], 75
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 75
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp slt i32 %x, 75
%cond = select i1 %cmp, i32 75, i32 %x
%cmp3 = icmp slt i32 %cond, 36
%retval = select i1 %cmp3, i32 36, i32 %cond
ret i32 %retval
}
; MAX(MAX(X, 68), 47) -> MAX(X, 68)
define i32 @test71(i32 %x) {
; CHECK-LABEL: @test71(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], 68
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 68
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 %x, 68
%cond = select i1 %cmp, i32 68, i32 %x
%cmp3 = icmp ult i32 %cond, 47
%retval = select i1 %cmp3, i32 47, i32 %cond
ret i32 %retval
}
; SMIN(SMIN(X, 92), 11) -> SMIN(X, 11)
define i32 @test72(i32 %x) {
; CHECK-LABEL: @test72(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 11
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 11
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp sgt i32 %x, 92
%cond = select i1 %cmp, i32 92, i32 %x
%cmp3 = icmp sgt i32 %cond, 11
%retval = select i1 %cmp3, i32 11, i32 %cond
ret i32 %retval
}
define <2 x i32> @test72vec(<2 x i32> %x) {
; CHECK-LABEL: @test72vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 11, i32 11>
; CHECK-NEXT: [[RETVAL:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 11, i32 11>
; CHECK-NEXT: ret <2 x i32> [[RETVAL]]
;
%cmp = icmp sgt <2 x i32> %x, <i32 92, i32 92>
%cond = select <2 x i1> %cmp, <2 x i32> <i32 92, i32 92>, <2 x i32> %x
%cmp3 = icmp sgt <2 x i32> %cond, <i32 11, i32 11>
%retval = select <2 x i1> %cmp3, <2 x i32> <i32 11, i32 11>, <2 x i32> %cond
ret <2 x i32> %retval
}
; MIN(MIN(X, 83), 24) -> MIN(X, 24)
define i32 @test73(i32 %x) {
; CHECK-LABEL: @test73(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 24
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 24
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp ugt i32 %x, 83
%cond = select i1 %cmp, i32 83, i32 %x
%cmp3 = icmp ugt i32 %cond, 24
%retval = select i1 %cmp3, i32 24, i32 %cond
ret i32 %retval
}
; SMAX(SMAX(X, 36), 75) -> SMAX(X, 75)
define i32 @test74(i32 %x) {
; CHECK-LABEL: @test74(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], 75
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 75
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp slt i32 %x, 36
%cond = select i1 %cmp, i32 36, i32 %x
%cmp3 = icmp slt i32 %cond, 75
%retval = select i1 %cmp3, i32 75, i32 %cond
ret i32 %retval
}
; MAX(MAX(X, 47), 68) -> MAX(X, 68)
define i32 @test75(i32 %x) {
; CHECK-LABEL: @test75(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], 68
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 68
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp ult i32 %x, 47
%cond = select i1 %cmp, i32 47, i32 %x
%cmp3 = icmp ult i32 %cond, 68
%retval = select i1 %cmp3, i32 68, i32 %cond
ret i32 %retval
}
; The next 10 tests are value clamping with constants:
; https://llvm.org/bugs/show_bug.cgi?id=31693
; (X <s C1) ? C1 : SMIN(X, C2) ==> SMAX(SMIN(X, C2), C1)
define i32 @clamp_signed1(i32 %x) {
; CHECK-LABEL: @clamp_signed1(
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp slt i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp slt i32 %x, 15
%r = select i1 %cmp1, i32 15, i32 %min
ret i32 %r
}
; (X >s C1) ? C1 : SMAX(X, C2) ==> SMIN(SMAX(X, C2), C1)
define i32 @clamp_signed2(i32 %x) {
; CHECK-LABEL: @clamp_signed2(
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp sgt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp sgt i32 %x, 255
%r = select i1 %cmp1, i32 255, i32 %max
ret i32 %r
}
; (X >s C1) ? SMIN(X, C2) : C1 ==> SMAX(SMIN(X, C2), C1)
define i32 @clamp_signed3(i32 %x) {
; CHECK-LABEL: @clamp_signed3(
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp slt i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp sgt i32 %x, 15
%r = select i1 %cmp1, i32 %min, i32 15
ret i32 %r
}
; (X <s C1) ? SMAX(X, C2) : C1 ==> SMIN(SMAX(X, C1), C2)
define i32 @clamp_signed4(i32 %x) {
; CHECK-LABEL: @clamp_signed4(
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp sgt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp slt i32 %x, 255
%r = select i1 %cmp1, i32 %max, i32 255
ret i32 %r
}
; (X <u C1) ? C1 : UMIN(X, C2) ==> UMAX(UMIN(X, C2), C1)
define i32 @clamp_unsigned1(i32 %x) {
; CHECK-LABEL: @clamp_unsigned1(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ult i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp ult i32 %x, 15
%r = select i1 %cmp1, i32 15, i32 %min
ret i32 %r
}
; (X >u C1) ? C1 : UMAX(X, C2) ==> UMIN(UMAX(X, C2), C1)
define i32 @clamp_unsigned2(i32 %x) {
; CHECK-LABEL: @clamp_unsigned2(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ugt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp ugt i32 %x, 255
%r = select i1 %cmp1, i32 255, i32 %max
ret i32 %r
}
; (X >u C1) ? UMIN(X, C2) : C1 ==> UMAX(UMIN(X, C2), C1)
define i32 @clamp_unsigned3(i32 %x) {
; CHECK-LABEL: @clamp_unsigned3(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ult i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp ugt i32 %x, 15
%r = select i1 %cmp1, i32 %min, i32 15
ret i32 %r
}
; (X <u C1) ? UMAX(X, C2) : C1 ==> UMIN(UMAX(X, C2), C1)
define i32 @clamp_unsigned4(i32 %x) {
; CHECK-LABEL: @clamp_unsigned4(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ugt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp ult i32 %x, 255
%r = select i1 %cmp1, i32 %max, i32 255
ret i32 %r
}
; Check that clamp is recognized and there is no infinite
; loop because of reverse cmp transformation:
; (icmp sgt smin(PositiveA, B) 0) -> (icmp sgt B 0)
define i32 @clamp_check_for_no_infinite_loop1(i32 %i) {
; CHECK-LABEL: @clamp_check_for_no_infinite_loop1(
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[I:%.*]], 255
; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[CMP1]], i32 [[I]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[SEL1]], 0
; CHECK-NEXT: [[RES:%.*]] = select i1 [[TMP1]], i32 [[SEL1]], i32 0
; CHECK-NEXT: ret i32 [[RES]]
;
%cmp1 = icmp slt i32 %i, 255
%sel1 = select i1 %cmp1, i32 %i, i32 255
%cmp2 = icmp slt i32 %i, 0
%res = select i1 %cmp2, i32 0, i32 %sel1
ret i32 %res
}
; Check that there is no infinite loop in case of:
; (icmp slt smax(NegativeA, B) 0) -> (icmp slt B 0)
define i32 @clamp_check_for_no_infinite_loop2(i32 %i) {
; CHECK-LABEL: @clamp_check_for_no_infinite_loop2(
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[I:%.*]], -255
; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[CMP1]], i32 [[I]], i32 -255
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[SEL1]], 0
; CHECK-NEXT: [[RES:%.*]] = select i1 [[TMP1]], i32 [[SEL1]], i32 0
; CHECK-NEXT: ret i32 [[RES]]
;
%cmp1 = icmp sgt i32 %i, -255
%sel1 = select i1 %cmp1, i32 %i, i32 -255
%cmp2 = icmp slt i32 %i, 0
%res = select i1 %cmp2, i32 %sel1, i32 0
ret i32 %res
}
; Check that there is no infinite loop because of reverse cmp transformation:
; (icmp slt smax(PositiveA, B) 2) -> (icmp eq B 1)
define i32 @clamp_check_for_no_infinite_loop3(i32 %i) {
; CHECK-LABEL: @clamp_check_for_no_infinite_loop3(
; CHECK-NEXT: [[I2:%.*]] = icmp sgt i32 [[I:%.*]], 1
; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i32 [[I]], i32 1
; CHECK-NEXT: br i1 true, label [[TRUELABEL:%.*]], label [[FALSELABEL:%.*]]
; CHECK: truelabel:
; CHECK-NEXT: [[I5:%.*]] = icmp slt i32 [[I3]], 2
; CHECK-NEXT: [[I6:%.*]] = select i1 [[I5]], i32 [[I3]], i32 2
; CHECK-NEXT: [[I7:%.*]] = shl nuw nsw i32 [[I6]], 2
; CHECK-NEXT: ret i32 [[I7]]
; CHECK: falselabel:
; CHECK-NEXT: ret i32 0
;
%i2 = icmp sgt i32 %i, 1
%i3 = select i1 %i2, i32 %i, i32 1
%i4 = icmp sgt i32 %i3, 0
br i1 %i4, label %truelabel, label %falselabel
truelabel: ; %i<=1, %i3>0
%i5 = icmp slt i32 %i3, 2
%i6 = select i1 %i5, i32 %i3, i32 2
%i7 = shl nuw nsw i32 %i6, 2
ret i32 %i7
falselabel:
ret i32 0
}
; The next 3 min tests should canonicalize to the same form...and not infinite loop.
define double @PR31751_umin1(i32 %x) {
; CHECK-LABEL: @PR31751_umin1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp slt i32 %x, 0
%sel = select i1 %cmp, i32 2147483647, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umin2(i32 %x) {
; CHECK-LABEL: @PR31751_umin2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[X]], i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ult i32 %x, 2147483647
%sel = select i1 %cmp, i32 %x, i32 2147483647
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umin3(i32 %x) {
; CHECK-LABEL: @PR31751_umin3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ugt i32 %x, 2147483647
%sel = select i1 %cmp, i32 2147483647, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
; The next 3 max tests should canonicalize to the same form...and not infinite loop.
define double @PR31751_umax1(i32 %x) {
; CHECK-LABEL: @PR31751_umax1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp sgt i32 %x, -1
%sel = select i1 %cmp, i32 2147483648, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umax2(i32 %x) {
; CHECK-LABEL: @PR31751_umax2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[X]], i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ugt i32 %x, 2147483648
%sel = select i1 %cmp, i32 %x, i32 2147483648
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umax3(i32 %x) {
; CHECK-LABEL: @PR31751_umax3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ult i32 %x, 2147483648
%sel = select i1 %cmp, i32 2147483648, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
; The icmp/select form a canonical smax, so don't hide that by folding the final bitcast into the select.
define float @bitcast_scalar_smax(float %x, float %y) {
; CHECK-LABEL: @bitcast_scalar_smax(
; CHECK-NEXT: [[BCX:%.*]] = bitcast float [[X:%.*]] to i32
; CHECK-NEXT: [[BCY:%.*]] = bitcast float [[Y:%.*]] to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[BCX]], i32 [[BCY]]
; CHECK-NEXT: [[BCS:%.*]] = bitcast i32 [[SEL]] to float
; CHECK-NEXT: ret float [[BCS]]
;
%bcx = bitcast float %x to i32
%bcy = bitcast float %y to i32
%cmp = icmp sgt i32 %bcx, %bcy
%sel = select i1 %cmp, i32 %bcx, i32 %bcy
%bcs = bitcast i32 %sel to float
ret float %bcs
}
; FIXME: Create a canonical umax by bitcasting the select.
define float @bitcast_scalar_umax(float %x, float %y) {
; CHECK-LABEL: @bitcast_scalar_umax(
; CHECK-NEXT: [[BCX:%.*]] = bitcast float [[X:%.*]] to i32
; CHECK-NEXT: [[BCY:%.*]] = bitcast float [[Y:%.*]] to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], float [[X]], float [[Y]]
; CHECK-NEXT: ret float [[SEL]]
;
%bcx = bitcast float %x to i32
%bcy = bitcast float %y to i32
%cmp = icmp ugt i32 %bcx, %bcy
%sel = select i1 %cmp, float %x, float %y
ret float %sel
}
; PR32306 - https://bugs.llvm.org/show_bug.cgi?id=32306
; The icmp/select form a canonical smin, so don't hide that by folding the final bitcast into the select.
define <8 x float> @bitcast_vector_smin(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @bitcast_vector_smin(
; CHECK-NEXT: [[BCX:%.*]] = bitcast <8 x float> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[BCY:%.*]] = bitcast <8 x float> [[Y:%.*]] to <8 x i32>
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <8 x i32> [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select <8 x i1> [[CMP]], <8 x i32> [[BCX]], <8 x i32> [[BCY]]
; CHECK-NEXT: [[BCS:%.*]] = bitcast <8 x i32> [[SEL]] to <8 x float>
; CHECK-NEXT: ret <8 x float> [[BCS]]
;
%bcx = bitcast <8 x float> %x to <8 x i32>
%bcy = bitcast <8 x float> %y to <8 x i32>
%cmp = icmp slt <8 x i32> %bcx, %bcy
%sel = select <8 x i1> %cmp, <8 x i32> %bcx, <8 x i32> %bcy
%bcs = bitcast <8 x i32> %sel to <8 x float>
ret <8 x float> %bcs
}
; FIXME: Create a canonical umin by bitcasting the select.
define <8 x float> @bitcast_vector_umin(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @bitcast_vector_umin(
; CHECK-NEXT: [[BCX:%.*]] = bitcast <8 x float> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[BCY:%.*]] = bitcast <8 x float> [[Y:%.*]] to <8 x i32>
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <8 x i32> [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select <8 x i1> [[CMP]], <8 x float> [[X]], <8 x float> [[Y]]
; CHECK-NEXT: ret <8 x float> [[SEL]]
;
%bcx = bitcast <8 x float> %x to <8 x i32>
%bcy = bitcast <8 x float> %y to <8 x i32>
%cmp = icmp slt <8 x i32> %bcx, %bcy
%sel = select <8 x i1> %cmp, <8 x float> %x, <8 x float> %y
ret <8 x float> %sel
}
; Check that we look through cast and recognize min idiom.
define zeroext i8 @look_through_cast1(i32 %x) {
; CHECK-LABEL: @look_through_cast1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 511
; CHECK-NEXT: [[RES1:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 511
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[RES1]] to i8
; CHECK-NEXT: ret i8 [[TMP2]]
;
%cmp1 = icmp slt i32 %x, 511
%x_trunc = trunc i32 %x to i8
%res = select i1 %cmp1, i8 %x_trunc, i8 255
ret i8 %res
}
; Check that we look through cast but min is not recognized.
define zeroext i8 @look_through_cast2(i32 %x) {
; CHECK-LABEL: @look_through_cast2(
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[X:%.*]], 510
; CHECK-NEXT: [[X_TRUNC:%.*]] = trunc i32 [[X]] to i8
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP1]], i8 [[X_TRUNC]], i8 -1
; CHECK-NEXT: ret i8 [[RES]]
;
%cmp1 = icmp slt i32 %x, 510
%x_trunc = trunc i32 %x to i8
%res = select i1 %cmp1, i8 %x_trunc, i8 255
ret i8 %res
}
define <2 x i8> @min_through_cast_vec1(<2 x i32> %x) {
; CHECK-LABEL: @min_through_cast_vec1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 510, i32 511>
; CHECK-NEXT: [[RES1:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 510, i32 511>
; CHECK-NEXT: [[TMP2:%.*]] = trunc <2 x i32> [[RES1]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[TMP2]]
;
%cmp = icmp slt <2 x i32> %x, <i32 510, i32 511>
%x_trunc = trunc <2 x i32> %x to <2 x i8>
%res = select <2 x i1> %cmp, <2 x i8> %x_trunc, <2 x i8> <i8 254, i8 255>
ret <2 x i8> %res
}
define <2 x i8> @min_through_cast_vec2(<2 x i32> %x) {
; CHECK-LABEL: @min_through_cast_vec2(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 511, i32 511>
; CHECK-NEXT: [[RES1:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 511, i32 511>
; CHECK-NEXT: [[TMP2:%.*]] = trunc <2 x i32> [[RES1]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[TMP2]]
;
%cmp = icmp slt <2 x i32> %x, <i32 511, i32 511>
%x_trunc = trunc <2 x i32> %x to <2 x i8>
%res = select <2 x i1> %cmp, <2 x i8> %x_trunc, <2 x i8> <i8 255, i8 255>
ret <2 x i8> %res
}
; Remove a min/max op in a sequence with a common operand.
; PR35717: https://bugs.llvm.org/show_bug.cgi?id=35717
; min(min(a, b), min(b, c)) --> min(min(a, b), c)
define i32 @common_factor_smin(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_smin(
; CHECK-NEXT: [[CMP_AB:%.*]] = icmp slt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[MIN_AB:%.*]] = select i1 [[CMP_AB]], i32 [[A]], i32 [[B]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MIN_AB]], [[C:%.*]]
; CHECK-NEXT: [[MIN_ABC:%.*]] = select i1 [[TMP1]], i32 [[MIN_AB]], i32 [[C]]
; CHECK-NEXT: ret i32 [[MIN_ABC]]
;
%cmp_ab = icmp slt i32 %a, %b
%min_ab = select i1 %cmp_ab, i32 %a, i32 %b
%cmp_bc = icmp slt i32 %b, %c
%min_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ab_bc = icmp slt i32 %min_ab, %min_bc
%min_abc = select i1 %cmp_ab_bc, i32 %min_ab, i32 %min_bc
ret i32 %min_abc
}
; max(max(a, b), max(c, b)) --> max(max(a, b), c)
define <2 x i32> @common_factor_smax(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
; CHECK-LABEL: @common_factor_smax(
; CHECK-NEXT: [[CMP_AB:%.*]] = icmp sgt <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[MAX_AB:%.*]] = select <2 x i1> [[CMP_AB]], <2 x i32> [[A]], <2 x i32> [[B]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt <2 x i32> [[MAX_AB]], [[C:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[MAX_AB]], <2 x i32> [[C]]
; CHECK-NEXT: ret <2 x i32> [[MAX_ABC]]
;
%cmp_ab = icmp sgt <2 x i32> %a, %b
%max_ab = select <2 x i1> %cmp_ab, <2 x i32> %a, <2 x i32> %b
%cmp_cb = icmp sgt <2 x i32> %c, %b
%max_cb = select <2 x i1> %cmp_cb, <2 x i32> %c, <2 x i32> %b
%cmp_ab_cb = icmp sgt <2 x i32> %max_ab, %max_cb
%max_abc = select <2 x i1> %cmp_ab_cb, <2 x i32> %max_ab, <2 x i32> %max_cb
ret <2 x i32> %max_abc
}
; min(min(b, c), min(a, b)) --> min(min(b, c), a)
define <2 x i32> @common_factor_umin(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
; CHECK-LABEL: @common_factor_umin(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ult <2 x i32> [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MIN_BC:%.*]] = select <2 x i1> [[CMP_BC]], <2 x i32> [[B]], <2 x i32> [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i32> [[MIN_BC]], [[A:%.*]]
; CHECK-NEXT: [[MIN_ABC:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[MIN_BC]], <2 x i32> [[A]]
; CHECK-NEXT: ret <2 x i32> [[MIN_ABC]]
;
%cmp_bc = icmp ult <2 x i32> %b, %c
%min_bc = select <2 x i1> %cmp_bc, <2 x i32> %b, <2 x i32> %c
%cmp_ab = icmp ult <2 x i32> %a, %b
%min_ab = select <2 x i1> %cmp_ab, <2 x i32> %a, <2 x i32> %b
%cmp_bc_ab = icmp ult <2 x i32> %min_bc, %min_ab
%min_abc = select <2 x i1> %cmp_bc_ab, <2 x i32> %min_bc, <2 x i32> %min_ab
ret <2 x i32> %min_abc
}
; max(max(b, c), max(b, a)) --> max(max(b, c), a)
define i32 @common_factor_umax(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ugt i32 [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MAX_BC:%.*]] = select i1 [[CMP_BC]], i32 [[B]], i32 [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MAX_BC]], [[A:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[TMP1]], i32 [[MAX_BC]], i32 [[A]]
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
ret i32 %max_abc
}
declare void @extra_use(i32)
define i32 @common_factor_umax_extra_use_lhs(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax_extra_use_lhs(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ugt i32 [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MAX_BC:%.*]] = select i1 [[CMP_BC]], i32 [[B]], i32 [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MAX_BC]], [[A:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[TMP1]], i32 [[MAX_BC]], i32 [[A]]
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BC]])
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
call void @extra_use(i32 %max_bc)
ret i32 %max_abc
}
define i32 @common_factor_umax_extra_use_rhs(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax_extra_use_rhs(
; CHECK-NEXT: [[CMP_BA:%.*]] = icmp ugt i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[MAX_BA:%.*]] = select i1 [[CMP_BA]], i32 [[B]], i32 [[A]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MAX_BA]], [[C:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[TMP1]], i32 [[MAX_BA]], i32 [[C]]
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BA]])
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
call void @extra_use(i32 %max_ba)
ret i32 %max_abc
}
define i32 @common_factor_umax_extra_use_both(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax_extra_use_both(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ugt i32 [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MAX_BC:%.*]] = select i1 [[CMP_BC]], i32 [[B]], i32 [[C]]
; CHECK-NEXT: [[CMP_BA:%.*]] = icmp ugt i32 [[B]], [[A:%.*]]
; CHECK-NEXT: [[MAX_BA:%.*]] = select i1 [[CMP_BA]], i32 [[B]], i32 [[A]]
; CHECK-NEXT: [[CMP_BC_BA:%.*]] = icmp ugt i32 [[MAX_BC]], [[MAX_BA]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[CMP_BC_BA]], i32 [[MAX_BC]], i32 [[MAX_BA]]
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BC]])
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BA]])
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
call void @extra_use(i32 %max_bc)
call void @extra_use(i32 %max_ba)
ret i32 %max_abc
}
; This would assert. Don't assume that earlier min/max types match a possible later min/max.
define float @not_min_of_min(i8 %i, float %x) {
; CHECK-LABEL: @not_min_of_min(
; CHECK-NEXT: [[CMP1_INV:%.*]] = fcmp fast oge float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[TMP1:%.*]] = select fast i1 [[CMP1_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp fast oge float [[X]], 2.000000e+00
; CHECK-NEXT: [[TMP2:%.*]] = select fast i1 [[CMP2_INV]], float 2.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp ult i8 [[I:%.*]], 16
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP3]], float [[TMP1]], float [[TMP2]]
; CHECK-NEXT: ret float [[R]]
;
%cmp1 = fcmp fast ult float %x, 1.0
%min1 = select i1 %cmp1, float %x, float 1.0
%cmp2 = fcmp fast ult float %x, 2.0
%min2 = select i1 %cmp2, float %x, float 2.0
%cmp3 = icmp ult i8 %i, 16
%r = select i1 %cmp3, float %min1, float %min2
ret float %r
}
define i32 @add_umin(i32 %x) {
; CHECK-LABEL: @add_umin(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 27
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 27
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i32 [[TMP2]], 15
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define i32 @add_umin_constant_limit(i32 %x) {
; CHECK-LABEL: @add_umin_constant_limit(
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[X:%.*]], 0
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 41, i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 41
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_umin_simplify(i32 %x) {
; CHECK-LABEL: @add_umin_simplify(
; CHECK-NEXT: ret i32 42
;
%a = add nuw i32 %x, 42
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_umin_simplify2(i32 %x) {
; CHECK-LABEL: @add_umin_simplify2(
; CHECK-NEXT: ret i32 42
;
%a = add nuw i32 %x, 43
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_umin_wrong_pred(i32 %x) {
; CHECK-LABEL: @add_umin_wrong_pred(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;