| ; Test that the fwrite library call simplifier works correctly. |
| ; |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| |
| %FILE = type { } |
| |
| @str = constant [1 x i8] zeroinitializer |
| @empty = constant [0 x i8] zeroinitializer |
| |
| declare i64 @fwrite(i8*, i64, i64, %FILE *) |
| |
| ; Check fwrite(S, 1, 1, fp) -> fputc(S[0], fp). |
| |
| define void @test_simplify1(%FILE* %fp) { |
| ; CHECK-LABEL: @test_simplify1( |
| %str = getelementptr inbounds [1 x i8], [1 x i8]* @str, i64 0, i64 0 |
| call i64 @fwrite(i8* %str, i64 1, i64 1, %FILE* %fp) |
| ; CHECK-NEXT: call i32 @fputc(i32 0, %FILE* %fp) |
| ret void |
| ; CHECK-NEXT: ret void |
| } |
| |
| define void @test_simplify2(%FILE* %fp) { |
| ; CHECK-LABEL: @test_simplify2( |
| %str = getelementptr inbounds [0 x i8], [0 x i8]* @empty, i64 0, i64 0 |
| call i64 @fwrite(i8* %str, i64 1, i64 0, %FILE* %fp) |
| ret void |
| ; CHECK-NEXT: ret void |
| } |
| |
| define void @test_simplify3(%FILE* %fp) { |
| ; CHECK-LABEL: @test_simplify3( |
| %str = getelementptr inbounds [0 x i8], [0 x i8]* @empty, i64 0, i64 0 |
| call i64 @fwrite(i8* %str, i64 0, i64 1, %FILE* %fp) |
| ret void |
| ; CHECK-NEXT: ret void |
| } |
| |
| define i64 @test_no_simplify1(%FILE* %fp) { |
| ; CHECK-LABEL: @test_no_simplify1( |
| %str = getelementptr inbounds [1 x i8], [1 x i8]* @str, i64 0, i64 0 |
| %ret = call i64 @fwrite(i8* %str, i64 1, i64 1, %FILE* %fp) |
| ; CHECK-NEXT: call i64 @fwrite |
| ret i64 %ret |
| ; CHECK-NEXT: ret i64 %ret |
| } |
| |
| define void @test_no_simplify2(%FILE* %fp, i64 %size) { |
| ; CHECK-LABEL: @test_no_simplify2( |
| %str = getelementptr inbounds [1 x i8], [1 x i8]* @str, i64 0, i64 0 |
| call i64 @fwrite(i8* %str, i64 %size, i64 1, %FILE* %fp) |
| ; CHECK-NEXT: call i64 @fwrite |
| ret void |
| ; CHECK-NEXT: ret void |
| } |