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cond-used-in-phi.ll
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cond-used-in-phi.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
declare void @use(i1)
declare void @llvm.assume(i1)
define void @phi_loop_1(i8 %x) {
; CHECK-LABEL: @phi_loop_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C_0:%.*]] = icmp uge i8 [[X:%.*]], 10
; CHECK-NEXT: br i1 [[C_0]], label [[LOOP:%.*]], label [[EXIT:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[C_PHI:%.*]] = phi i1 [ false, [[ENTRY]] ], [ true, [[LOOP]] ]
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp ult i8 [[IV_NEXT]], 3
; CHECK-NEXT: br i1 [[EC]], label [[LOOP]], label [[LOOP_EXIT:%.*]]
; CHECK: loop.exit:
; CHECK-NEXT: call void @use(i1 [[C_PHI]])
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%c.0 = icmp uge i8 %x, 10
br i1 %c.0, label %loop, label %exit
loop:
%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
%c.phi = phi i1 [ false, %entry ], [ %t.1, %loop ]
%t.1 = icmp uge i8 %x, 8
call void @use(i1 %t.1)
%iv.next = add i8 %iv, 1
%ec = icmp ult i8 %iv.next, 3
br i1 %ec, label %loop, label %loop.exit
loop.exit:
call void @use(i1 %c.phi)
br label %exit
exit:
ret void
}
define void @phi_loop_2(i8 %x) {
; CHECK-LABEL: @phi_loop_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C_0:%.*]] = icmp uge i8 [[X:%.*]], 10
; CHECK-NEXT: br i1 [[C_0]], label [[LOOP_1_HEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.1.header:
; CHECK-NEXT: [[C_PHI:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ true, [[LOOP_1_LATCH:%.*]] ]
; CHECK-NEXT: br label [[LOOP_2:%.*]]
; CHECK: loop.2:
; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 0, [[LOOP_1_HEADER]] ], [ [[IV_NEXT:%.*]], [[LOOP_2]] ]
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp ult i8 [[IV_NEXT]], 3
; CHECK-NEXT: br i1 [[EC]], label [[LOOP_2]], label [[LOOP_1_LATCH]]
; CHECK: loop.1.latch:
; CHECK-NEXT: br i1 false, label [[LOOP_1_HEADER]], label [[LOOP_1_EXIT:%.*]]
; CHECK: loop.1.exit:
; CHECK-NEXT: call void @use(i1 [[C_PHI]])
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%c.0 = icmp uge i8 %x, 10
br i1 %c.0, label %loop.1.header, label %exit
loop.1.header:
%c.phi = phi i1 [ false, %entry ], [ %t.1, %loop.1.latch ]
br label %loop.2
loop.2:
%iv = phi i8 [ 0, %loop.1.header ], [ %iv.next, %loop.2 ]
%t.1 = icmp uge i8 %x, 8
call void @use(i1 %t.1)
%iv.next = add i8 %iv, 1
%ec = icmp ult i8 %iv.next, 3
br i1 %ec, label %loop.2, label %loop.1.latch
loop.1.latch:
br i1 false, label %loop.1.header, label %loop.1.exit
loop.1.exit:
call void @use(i1 %c.phi)
br label %exit
exit:
ret void
}
define void @phi_loop_3(i8 %x, i1 %c) {
; CHECK-LABEL: @phi_loop_3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[C_0:%.*]] = icmp uge i8 [[X:%.*]], 10
; CHECK-NEXT: br i1 [[C_0]], label [[LOOP:%.*]], label [[EXIT:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[C_PHI:%.*]] = phi i1 [ false, [[ENTRY]] ], [ true, [[LOOP_LATCH]] ]
; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP_LATCH]], label [[LOOP_EXIT:%.*]]
; CHECK: loop.latch:
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: [[IV_NEXT]] = add i8 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp ult i8 [[IV_NEXT]], 3
; CHECK-NEXT: br i1 [[EC]], label [[LOOP]], label [[LOOP_EXIT]]
; CHECK: loop.exit:
; CHECK-NEXT: call void @use(i1 [[C_PHI]])
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%c.0 = icmp uge i8 %x, 10
br i1 %c.0, label %loop, label %exit
loop:
%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop.latch ]
%c.phi = phi i1 [ false, %entry ], [ %t.1, %loop.latch ]
br i1 %c, label %loop.latch, label %loop.exit
loop.latch:
%t.1 = icmp uge i8 %x, 8
call void @use(i1 %t.1)
%iv.next = add i8 %iv, 1
%ec = icmp ult i8 %iv.next, 3
br i1 %ec, label %loop, label %loop.exit
loop.exit:
call void @use(i1 %c.phi)
br label %exit
exit:
ret void
}
define i1 @test_if_then_1(i8 %x) {
; CHECK-LABEL: @test_if_then_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[X:%.*]], 1
; CHECK-NEXT: br i1 [[CMP1]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi i1 [ true, [[IF]] ], [ false, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret i1 [[PHI]]
;
entry:
%cmp1 = icmp sgt i8 %x, 1
br i1 %cmp1, label %if, label %join
if:
%cmp2 = icmp sgt i8 %x, 0
br label %join
join:
%phi = phi i1 [ %cmp2, %if ], [ false, %entry ]
ret i1 %phi
}
define i1 @test_if_then_2(i1 %c, i8 %x) {
; CHECK-LABEL: @test_if_then_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[X:%.*]], 1
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi i1 [ true, [[IF]] ], [ false, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret i1 [[PHI]]
;
entry:
%cmp2 = icmp sgt i8 %x, 0
br i1 %c, label %if, label %join
if:
%cmp1 = icmp sgt i8 %x, 1
call void @llvm.assume(i1 %cmp1)
br label %join
join:
%phi = phi i1 [ %cmp2, %if ], [ false, %entry ]
ret i1 %phi
}
define i1 @test_if_then_3(i1 %c.0, i8 %x) {
; CHECK-LABEL: @test_if_then_3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C_0:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[X:%.*]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i8 [[X]], 1
; CHECK-NEXT: br i1 [[CMP1]], label [[THEN_1:%.*]], label [[JOIN]]
; CHECK: then.1:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi i1 [ [[CMP2]], [[IF]] ], [ true, [[THEN_1]] ], [ false, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret i1 [[PHI]]
;
entry:
br i1 %c.0, label %if, label %join
if:
%cmp1 = icmp sgt i8 %x, 1
%cmp2 = icmp sgt i8 %x, 1
br i1 %cmp1, label %then.1, label %join
then.1:
br label %join
join:
%phi = phi i1 [ %cmp2, %if ], [ %cmp2, %then.1 ], [ false, %entry ]
ret i1 %phi
}
define i1 @test_if_then_4(i1 %c.0, i8 %x) {
; CHECK-LABEL: @test_if_then_4(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C_0:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i8 [[X:%.*]], 1
; CHECK-NEXT: br i1 [[CMP1]], label [[THEN_1:%.*]], label [[ELSE_1:%.*]]
; CHECK: then.1:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: else.1:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi i1 [ false, [[ELSE_1]] ], [ true, [[THEN_1]] ], [ false, [[ENTRY:%.*]] ]
; CHECK-NEXT: ret i1 [[PHI]]
;
entry:
br i1 %c.0, label %if, label %join
if:
%cmp1 = icmp sgt i8 %x, 1
%cmp2 = icmp sgt i8 %x, 1
br i1 %cmp1, label %then.1, label %else.1
then.1:
br label %join
else.1:
br label %join
join:
%phi = phi i1 [ %cmp2, %else.1 ], [ %cmp2, %then.1 ], [ false, %entry ]
ret i1 %phi
}