1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -sink-common-insts -S < %s | FileCheck %s 3 4; Test that we tail merge this kind of code with glibc-style assertion 5; failure calls: 6; #include <assert.h> 7; void merge_glibc_asserts(unsigned x, unsigned y) { 8; assert(x < y); 9; assert(y - x > 7); 10; assert(y - x < 40); 11; } 12; 13; glibc's __assert_fail function takes four parameters, and it is profitable to 14; phi two of them. 15 16@.str = private unnamed_addr constant [6 x i8] c"x < y\00", align 1 17@.str.1 = private unnamed_addr constant [6 x i8] c"t.cpp\00", align 1 18@__PRETTY_FUNCTION__._Z1fjj = private unnamed_addr constant [35 x i8] c"void f(unsigned int, unsigned int)\00", align 1 19@.str.2 = private unnamed_addr constant [10 x i8] c"y - x > 7\00", align 1 20@.str.3 = private unnamed_addr constant [11 x i8] c"y - x < 40\00", align 1 21 22declare void @glibc_assert_fail(ptr, ptr, i32, ptr) 23 24define void @merge_glibc_asserts(i32 %x, i32 %y) { 25; CHECK-LABEL: @merge_glibc_asserts( 26; CHECK-NEXT: entry: 27; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[Y:%.*]], [[X:%.*]] 28; CHECK-NEXT: br i1 [[CMP]], label [[COND_END:%.*]], label [[COND_FALSE:%.*]] 29; CHECK: cond.false: 30; CHECK-NEXT: tail call void @glibc_assert_fail(ptr @.str, ptr @.str.1, i32 3, ptr @__PRETTY_FUNCTION__._Z1fjj) 31; CHECK-NEXT: unreachable 32; CHECK: cond.end: 33; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[Y]], [[X]] 34; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[SUB]], 7 35; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END4:%.*]], label [[COND_FALSE3:%.*]] 36; CHECK: cond.false3: 37; CHECK-NEXT: tail call void @glibc_assert_fail(ptr @.str.2, ptr @.str.1, i32 4, ptr @__PRETTY_FUNCTION__._Z1fjj) 38; CHECK-NEXT: unreachable 39; CHECK: cond.end4: 40; CHECK-NEXT: [[CMP6:%.*]] = icmp ult i32 [[SUB]], 40 41; CHECK-NEXT: br i1 [[CMP6]], label [[COND_END9:%.*]], label [[COND_FALSE8:%.*]] 42; CHECK: cond.false8: 43; CHECK-NEXT: tail call void @glibc_assert_fail(ptr @.str.3, ptr @.str.1, i32 5, ptr @__PRETTY_FUNCTION__._Z1fjj) 44; CHECK-NEXT: unreachable 45; CHECK: cond.end9: 46; CHECK-NEXT: ret void 47; 48entry: 49 %cmp = icmp ugt i32 %y, %x 50 br i1 %cmp, label %cond.end, label %cond.false 51 52cond.false: ; preds = %entry 53 tail call void @glibc_assert_fail(ptr @.str, ptr @.str.1, i32 3, ptr @__PRETTY_FUNCTION__._Z1fjj) #2 54 unreachable 55 56cond.end: ; preds = %entry 57 %sub = sub i32 %y, %x 58 %cmp1 = icmp ugt i32 %sub, 7 59 br i1 %cmp1, label %cond.end4, label %cond.false3 60 61cond.false3: ; preds = %cond.end 62 tail call void @glibc_assert_fail(ptr @.str.2, ptr @.str.1, i32 4, ptr @__PRETTY_FUNCTION__._Z1fjj) #2 63 unreachable 64 65cond.end4: ; preds = %cond.end 66 %cmp6 = icmp ult i32 %sub, 40 67 br i1 %cmp6, label %cond.end9, label %cond.false8 68 69cond.false8: ; preds = %cond.end4 70 tail call void @glibc_assert_fail(ptr @.str.3, ptr @.str.1, i32 5, ptr @__PRETTY_FUNCTION__._Z1fjj) #2 71 unreachable 72 73cond.end9: ; preds = %cond.end4 74 ret void 75} 76