| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| ; PR1201 |
| define i32 @main(i32 %argc, i8** %argv) { |
| %c_19 = alloca i8* |
| %malloc_206 = tail call i8* @malloc(i32 mul (i32 ptrtoint (i8* getelementptr (i8* null, i32 1) to i32), i32 10)) |
| store i8* %malloc_206, i8** %c_19 |
| %tmp_207 = load i8** %c_19 |
| tail call void @free(i8* %tmp_207) |
| ret i32 0 |
| ; CHECK-NOT: malloc |
| ; CHECK-NOT: free |
| ; CHECK: ret i32 0 |
| } |
| |
| declare noalias i8* @malloc(i32) |
| declare void @free(i8*) |
| |
| define i1 @foo() { |
| ; CHECK: @foo |
| ; CHECK-NEXT: ret i1 false |
| %m = call i8* @malloc(i32 1) |
| %z = icmp eq i8* %m, null |
| call void @free(i8* %m) |
| ret i1 %z |
| } |
| |
| declare void @llvm.lifetime.start(i64, i8*) |
| declare void @llvm.lifetime.end(i64, i8*) |
| |
| define void @test3() { |
| ; CHECK: @test3 |
| ; CHECK-NEXT: ret void |
| %a = call noalias i8* @malloc(i32 10) |
| call void @llvm.lifetime.start(i64 10, i8* %a) |
| call void @llvm.lifetime.end(i64 10, i8* %a) |
| ret void |
| } |
| |
| ;; This used to crash. |
| define void @test4() { |
| ; CHECK: @test4 |
| ; CHECK-NEXT: ret void |
| %A = call i8* @malloc(i32 16000) |
| %B = bitcast i8* %A to double* |
| %C = bitcast double* %B to i8* |
| call void @free(i8* %C) |
| ret void |
| } |