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