| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| @hello = constant [6 x i8] c"hello\00" |
| @null = constant [1 x i8] zeroinitializer |
| |
| declare i8* @strndup(i8*, i32) |
| |
| define i8* @test1() { |
| ; CHECK-LABEL: @test1( |
| ; CHECK-NEXT: [[STRDUP:%.*]] = call dereferenceable_or_null(1) i8* @strdup(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @null, i64 0, i64 0)) |
| ; CHECK-NEXT: ret i8* [[STRDUP]] |
| ; |
| %src = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 |
| %ret = call i8* @strndup(i8* %src, i32 0) |
| ret i8* %ret |
| } |
| |
| define i8* @test2() { |
| ; CHECK-LABEL: @test2( |
| ; CHECK-NEXT: [[RET:%.*]] = call dereferenceable_or_null(5) i8* @strndup(i8* dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0), i32 4) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call i8* @strndup(i8* %src, i32 4) |
| ret i8* %ret |
| } |
| |
| define i8* @test3() { |
| ; CHECK-LABEL: @test3( |
| ; CHECK-NEXT: [[STRDUP:%.*]] = call dereferenceable_or_null(6) i8* @strdup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0)) |
| ; CHECK-NEXT: ret i8* [[STRDUP]] |
| ; |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call i8* @strndup(i8* %src, i32 5) |
| ret i8* %ret |
| } |
| |
| define i8* @test4() { |
| ; CHECK-LABEL: @test4( |
| ; CHECK-NEXT: [[STRDUP:%.*]] = call dereferenceable_or_null(6) i8* @strdup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0)) |
| ; CHECK-NEXT: ret i8* [[STRDUP]] |
| ; |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call i8* @strndup(i8* %src, i32 6) |
| ret i8* %ret |
| } |
| |
| define i8* @test5() { |
| ; CHECK-LABEL: @test5( |
| ; CHECK-NEXT: [[STRDUP:%.*]] = call dereferenceable_or_null(6) i8* @strdup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0)) |
| ; CHECK-NEXT: ret i8* [[STRDUP]] |
| ; |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call i8* @strndup(i8* %src, i32 7) |
| ret i8* %ret |
| } |
| |
| define i8* @test6(i32 %n) { |
| ; CHECK-LABEL: @test6( |
| ; CHECK-NEXT: [[RET:%.*]] = call i8* @strndup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0), i32 [[N:%.*]]) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| %ret = call i8* @strndup(i8* %src, i32 %n) |
| ret i8* %ret |
| } |