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