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; 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
}
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