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split-block-does-work.ll
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split-block-does-work.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -mergeicmps -verify-dom-info -mtriple=x86_64-unknown-unknown -S | FileCheck %s --check-prefix=X86
%S = type { i32, i32, i32, i32 }
declare void @foo(...)
; We can split %entry and create a memcmp(16 bytes).
define zeroext i1 @opeq1(
; X86-LABEL: @opeq1(
; X86-NEXT: "entry+land.rhs.i+land.rhs.i.2+land.rhs.i.3":
; X86-NEXT: call void (...) @foo() #[[ATTR2:[0-9]+]]
; X86-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[S:%.*]], %S* [[A:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP1:%.*]] = getelementptr inbounds [[S]], %S* [[B:%.*]], i64 0, i32 0
; X86-NEXT: [[CSTR:%.*]] = bitcast i32* [[TMP0]] to i8*
; X86-NEXT: [[CSTR1:%.*]] = bitcast i32* [[TMP1]] to i8*
; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 16)
; X86-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0
; X86-NEXT: br label [[OPEQ1_EXIT:%.*]]
; X86: opeq1.exit:
; X86-NEXT: ret i1 [[TMP2]]
;
; Make sure this call is moved to the beginning of the entry block.
%S* nocapture readonly dereferenceable(16) %a,
%S* nocapture readonly dereferenceable(16) %b) local_unnamed_addr nofree nosync {
entry:
%first.i = getelementptr inbounds %S, %S* %a, i64 0, i32 0
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %S, %S* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
; Does other work.
call void (...) @foo() inaccessiblememonly
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %S, %S* %a, i64 0, i32 1
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %S, %S* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 2
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %S, %S* %a, i64 0, i32 3
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}
; We will not be able to merge anything, make sure the call is not moved out.
define zeroext i1 @opeq1_discontiguous(
; X86-LABEL: @opeq1_discontiguous(
; X86-NEXT: entry:
; X86-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds [[S:%.*]], %S* [[A:%.*]], i64 0, i32 1
; X86-NEXT: [[TMP0:%.*]] = load i32, i32* [[FIRST_I]], align 4
; X86-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds [[S]], %S* [[B:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP1:%.*]] = load i32, i32* [[FIRST1_I]], align 4
; X86-NEXT: call void (...) @foo() #[[ATTR2]]
; X86-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
; X86-NEXT: br i1 [[CMP_I]], label [[LAND_RHS_I:%.*]], label [[OPEQ1_EXIT:%.*]]
; X86: land.rhs.i:
; X86-NEXT: [[SECOND_I:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 2
; X86-NEXT: [[TMP2:%.*]] = load i32, i32* [[SECOND_I]], align 4
; X86-NEXT: [[SECOND2_I:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 1
; X86-NEXT: [[TMP3:%.*]] = load i32, i32* [[SECOND2_I]], align 4
; X86-NEXT: [[CMP2_I:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]]
; X86-NEXT: br i1 [[CMP2_I]], label [[LAND_RHS_I_2:%.*]], label [[OPEQ1_EXIT]]
; X86: land.rhs.i.2:
; X86-NEXT: [[THIRD_I:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 2
; X86-NEXT: [[TMP4:%.*]] = load i32, i32* [[THIRD_I]], align 4
; X86-NEXT: [[THIRD2_I:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 3
; X86-NEXT: [[TMP5:%.*]] = load i32, i32* [[THIRD2_I]], align 4
; X86-NEXT: [[CMP3_I:%.*]] = icmp eq i32 [[TMP4]], [[TMP5]]
; X86-NEXT: br i1 [[CMP3_I]], label [[LAND_RHS_I_3:%.*]], label [[OPEQ1_EXIT]]
; X86: land.rhs.i.3:
; X86-NEXT: [[FOURTH_I:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 1
; X86-NEXT: [[TMP6:%.*]] = load i32, i32* [[FOURTH_I]], align 4
; X86-NEXT: [[FOURTH2_I:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 3
; X86-NEXT: [[TMP7:%.*]] = load i32, i32* [[FOURTH2_I]], align 4
; X86-NEXT: [[CMP4_I:%.*]] = icmp eq i32 [[TMP6]], [[TMP7]]
; X86-NEXT: br label [[OPEQ1_EXIT]]
; X86: opeq1.exit:
; X86-NEXT: [[TMP8:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ false, [[LAND_RHS_I]] ], [ false, [[LAND_RHS_I_2]] ], [ [[CMP4_I]], [[LAND_RHS_I_3]] ]
; X86-NEXT: ret i1 [[TMP8]]
;
; Make sure this call is moved in the entry block.
%S* nocapture readonly dereferenceable(16) %a,
%S* nocapture readonly dereferenceable(16) %b) local_unnamed_addr #0 {
entry:
%first.i = getelementptr inbounds %S, %S* %a, i64 0, i32 1
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %S, %S* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
; Does other work.
call void (...) @foo() inaccessiblememonly
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %S, %S* %a, i64 0, i32 2
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %S, %S* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 3
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %S, %S* %a, i64 0, i32 1
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}
; TODO: The call happen before the loads, so it cannot clobber them.
define zeroext i1 @opeq1_call_before_loads(
; X86-LABEL: @opeq1_call_before_loads(
; X86-NEXT: entry:
; X86-NEXT: call void (...) @foo()
; X86-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds [[S:%.*]], %S* [[A:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP0:%.*]] = load i32, i32* [[FIRST_I]], align 4
; X86-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds [[S]], %S* [[B:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP1:%.*]] = load i32, i32* [[FIRST1_I]], align 4
; X86-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
; X86-NEXT: br i1 [[CMP_I]], label %"land.rhs.i+land.rhs.i.2+land.rhs.i.3", label [[OPEQ1_EXIT:%.*]]
; X86: "land.rhs.i+land.rhs.i.2+land.rhs.i.3":
; X86-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 1
; X86-NEXT: [[TMP3:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 1
; X86-NEXT: [[CSTR:%.*]] = bitcast i32* [[TMP2]] to i8*
; X86-NEXT: [[CSTR1:%.*]] = bitcast i32* [[TMP3]] to i8*
; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 12)
; X86-NEXT: [[TMP4:%.*]] = icmp eq i32 [[MEMCMP]], 0
; X86-NEXT: br label [[OPEQ1_EXIT]]
; X86: opeq1.exit:
; X86-NEXT: [[TMP5:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[TMP4]], %"land.rhs.i+land.rhs.i.2+land.rhs.i.3" ]
; X86-NEXT: ret i1 [[TMP5]]
;
; Make sure this call is moved to the beginning of the entry block.
%S* nocapture readonly dereferenceable(16) %a,
%S* nocapture readonly dereferenceable(16) %b) local_unnamed_addr nofree nosync {
entry:
call void (...) @foo()
%first.i = getelementptr inbounds %S, %S* %a, i64 0, i32 0
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %S, %S* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %S, %S* %a, i64 0, i32 1
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %S, %S* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 2
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %S, %S* %a, i64 0, i32 3
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}
; Call happens after the loads, and may clobber them.
define zeroext i1 @opeq1_call_after_loads(
; X86-LABEL: @opeq1_call_after_loads(
; X86-NEXT: entry:
; X86-NEXT: [[FIRST_I:%.*]] = getelementptr inbounds [[S:%.*]], %S* [[A:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP0:%.*]] = load i32, i32* [[FIRST_I]], align 4
; X86-NEXT: [[FIRST1_I:%.*]] = getelementptr inbounds [[S]], %S* [[B:%.*]], i64 0, i32 0
; X86-NEXT: [[TMP1:%.*]] = load i32, i32* [[FIRST1_I]], align 4
; X86-NEXT: call void (...) @foo()
; X86-NEXT: [[CMP_I:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
; X86-NEXT: br i1 [[CMP_I]], label %"land.rhs.i+land.rhs.i.2+land.rhs.i.3", label [[OPEQ1_EXIT:%.*]]
; X86: "land.rhs.i+land.rhs.i.2+land.rhs.i.3":
; X86-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[S]], %S* [[A]], i64 0, i32 1
; X86-NEXT: [[TMP3:%.*]] = getelementptr inbounds [[S]], %S* [[B]], i64 0, i32 1
; X86-NEXT: [[CSTR:%.*]] = bitcast i32* [[TMP2]] to i8*
; X86-NEXT: [[CSTR1:%.*]] = bitcast i32* [[TMP3]] to i8*
; X86-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 12)
; X86-NEXT: [[TMP4:%.*]] = icmp eq i32 [[MEMCMP]], 0
; X86-NEXT: br label [[OPEQ1_EXIT]]
; X86: opeq1.exit:
; X86-NEXT: [[TMP5:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[TMP4]], %"land.rhs.i+land.rhs.i.2+land.rhs.i.3" ]
; X86-NEXT: ret i1 [[TMP5]]
;
; Make sure this call is moved to the beginning of the entry block.
%S* nocapture readonly dereferenceable(16) %a,
%S* nocapture readonly dereferenceable(16) %b) local_unnamed_addr nofree nosync {
entry:
%first.i = getelementptr inbounds %S, %S* %a, i64 0, i32 0
%0 = load i32, i32* %first.i, align 4
%first1.i = getelementptr inbounds %S, %S* %b, i64 0, i32 0
%1 = load i32, i32* %first1.i, align 4
call void (...) @foo()
%cmp.i = icmp eq i32 %0, %1
br i1 %cmp.i, label %land.rhs.i, label %opeq1.exit
land.rhs.i:
%second.i = getelementptr inbounds %S, %S* %a, i64 0, i32 1
%2 = load i32, i32* %second.i, align 4
%second2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 1
%3 = load i32, i32* %second2.i, align 4
%cmp2.i = icmp eq i32 %2, %3
br i1 %cmp2.i, label %land.rhs.i.2, label %opeq1.exit
land.rhs.i.2:
%third.i = getelementptr inbounds %S, %S* %a, i64 0, i32 2
%4 = load i32, i32* %third.i, align 4
%third2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 2
%5 = load i32, i32* %third2.i, align 4
%cmp3.i = icmp eq i32 %4, %5
br i1 %cmp3.i, label %land.rhs.i.3, label %opeq1.exit
land.rhs.i.3:
%fourth.i = getelementptr inbounds %S, %S* %a, i64 0, i32 3
%6 = load i32, i32* %fourth.i, align 4
%fourth2.i = getelementptr inbounds %S, %S* %b, i64 0, i32 3
%7 = load i32, i32* %fourth2.i, align 4
%cmp4.i = icmp eq i32 %6, %7
br label %opeq1.exit
opeq1.exit:
%8 = phi i1 [ false, %entry ], [ false, %land.rhs.i] , [ false, %land.rhs.i.2 ], [ %cmp4.i, %land.rhs.i.3 ]
ret i1 %8
}