76 lines
4.3 KiB
LLVM
76 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -sink-common-insts -S < %s | FileCheck %s
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; Test that we tail merge this kind of code with glibc-style assertion
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; failure calls:
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; #include <assert.h>
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; void merge_glibc_asserts(unsigned x, unsigned y) {
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; assert(x < y);
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; assert(y - x > 7);
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; assert(y - x < 40);
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; }
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;
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; glibc's __assert_fail function takes four parameters, and it is profitable to
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; phi two of them.
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@.str = private unnamed_addr constant [6 x i8] c"x < y\00", align 1
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@.str.1 = private unnamed_addr constant [6 x i8] c"t.cpp\00", align 1
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@__PRETTY_FUNCTION__._Z1fjj = private unnamed_addr constant [35 x i8] c"void f(unsigned int, unsigned int)\00", align 1
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@.str.2 = private unnamed_addr constant [10 x i8] c"y - x > 7\00", align 1
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@.str.3 = private unnamed_addr constant [11 x i8] c"y - x < 40\00", align 1
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declare void @glibc_assert_fail(i8*, i8*, i32, i8*)
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define void @merge_glibc_asserts(i32 %x, i32 %y) {
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; CHECK-LABEL: @merge_glibc_asserts(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[Y:%.*]], [[X:%.*]]
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; CHECK-NEXT: br i1 [[CMP]], label [[COND_END:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: tail call void @glibc_assert_fail(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 3, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @__PRETTY_FUNCTION__._Z1fjj, i64 0, i64 0))
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; CHECK-NEXT: unreachable
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; CHECK: cond.end:
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; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[Y]], [[X]]
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[SUB]], 7
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; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END4:%.*]], label [[COND_FALSE3:%.*]]
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; CHECK: cond.false3:
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; CHECK-NEXT: tail call void @glibc_assert_fail(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 4, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @__PRETTY_FUNCTION__._Z1fjj, i64 0, i64 0))
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; CHECK-NEXT: unreachable
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; CHECK: cond.end4:
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; CHECK-NEXT: [[CMP6:%.*]] = icmp ult i32 [[SUB]], 40
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; CHECK-NEXT: br i1 [[CMP6]], label [[COND_END9:%.*]], label [[COND_FALSE8:%.*]]
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; CHECK: cond.false8:
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; CHECK-NEXT: tail call void @glibc_assert_fail(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 5, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @__PRETTY_FUNCTION__._Z1fjj, i64 0, i64 0))
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; CHECK-NEXT: unreachable
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; CHECK: cond.end9:
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; CHECK-NEXT: ret void
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;
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entry:
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%cmp = icmp ugt i32 %y, %x
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br i1 %cmp, label %cond.end, label %cond.false
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cond.false: ; preds = %entry
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tail call void @glibc_assert_fail(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 3, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @__PRETTY_FUNCTION__._Z1fjj, i64 0, i64 0)) #2
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unreachable
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cond.end: ; preds = %entry
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%sub = sub i32 %y, %x
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%cmp1 = icmp ugt i32 %sub, 7
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br i1 %cmp1, label %cond.end4, label %cond.false3
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cond.false3: ; preds = %cond.end
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tail call void @glibc_assert_fail(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 4, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @__PRETTY_FUNCTION__._Z1fjj, i64 0, i64 0)) #2
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unreachable
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cond.end4: ; preds = %cond.end
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%cmp6 = icmp ult i32 %sub, 40
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br i1 %cmp6, label %cond.end9, label %cond.false8
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cond.false8: ; preds = %cond.end4
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tail call void @glibc_assert_fail(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 5, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @__PRETTY_FUNCTION__._Z1fjj, i64 0, i64 0)) #2
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unreachable
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cond.end9: ; preds = %cond.end4
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ret void
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}
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