1; Test that the fwrite library call simplifier works correctly. 2; 3; RUN: opt < %s -instcombine -S | FileCheck %s 4 5target 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" 6 7%FILE = type { } 8 9@str = constant [1 x i8] zeroinitializer 10@empty = constant [0 x i8] zeroinitializer 11 12declare i64 @fwrite(i8*, i64, i64, %FILE *) 13 14; Check fwrite(S, 1, 1, fp) -> fputc(S[0], fp). 15 16define void @test_simplify1(%FILE* %fp) { 17; CHECK-LABEL: @test_simplify1( 18 %str = getelementptr inbounds [1 x i8], [1 x i8]* @str, i64 0, i64 0 19 call i64 @fwrite(i8* %str, i64 1, i64 1, %FILE* %fp) 20; CHECK-NEXT: call i32 @fputc(i32 0, %FILE* %fp) 21 ret void 22; CHECK-NEXT: ret void 23} 24 25define void @test_simplify2(%FILE* %fp) { 26; CHECK-LABEL: @test_simplify2( 27 %str = getelementptr inbounds [0 x i8], [0 x i8]* @empty, i64 0, i64 0 28 call i64 @fwrite(i8* %str, i64 1, i64 0, %FILE* %fp) 29 ret void 30; CHECK-NEXT: ret void 31} 32 33define void @test_simplify3(%FILE* %fp) { 34; CHECK-LABEL: @test_simplify3( 35 %str = getelementptr inbounds [0 x i8], [0 x i8]* @empty, i64 0, i64 0 36 call i64 @fwrite(i8* %str, i64 0, i64 1, %FILE* %fp) 37 ret void 38; CHECK-NEXT: ret void 39} 40 41define i64 @test_no_simplify1(%FILE* %fp) { 42; CHECK-LABEL: @test_no_simplify1( 43 %str = getelementptr inbounds [1 x i8], [1 x i8]* @str, i64 0, i64 0 44 %ret = call i64 @fwrite(i8* %str, i64 1, i64 1, %FILE* %fp) 45; CHECK-NEXT: call i64 @fwrite 46 ret i64 %ret 47; CHECK-NEXT: ret i64 %ret 48} 49 50define void @test_no_simplify2(%FILE* %fp, i64 %size) { 51; CHECK-LABEL: @test_no_simplify2( 52 %str = getelementptr inbounds [1 x i8], [1 x i8]* @str, i64 0, i64 0 53 call i64 @fwrite(i8* %str, i64 %size, i64 1, %FILE* %fp) 54; CHECK-NEXT: call i64 @fwrite 55 ret void 56; CHECK-NEXT: ret void 57} 58