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c2e331275b
This patch migrates the fwrite optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168892 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
1.7 KiB
LLVM
58 lines
1.7 KiB
LLVM
; Test that the fwrite library call simplifier works correctly.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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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"
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%FILE = type { }
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@str = constant [1 x i8] zeroinitializer
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@empty = constant [0 x i8] zeroinitializer
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declare i64 @fwrite(i8*, i64, i64, %FILE *)
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; Check fwrite(S, 1, 1, fp) -> fputc(S[0], fp).
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define void @test_simplify1(%FILE* %fp) {
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; CHECK: @test_simplify1
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%str = getelementptr inbounds [1 x i8]* @str, i64 0, i64 0
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call i64 @fwrite(i8* %str, i64 1, i64 1, %FILE* %fp)
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; CHECK-NEXT: call i32 @fputc(i32 0, %FILE* %fp)
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ret void
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; CHECK-NEXT: ret void
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}
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define void @test_simplify2(%FILE* %fp) {
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; CHECK: @test_simplify2
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%str = getelementptr inbounds [0 x i8]* @empty, i64 0, i64 0
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call i64 @fwrite(i8* %str, i64 1, i64 0, %FILE* %fp)
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ret void
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; CHECK-NEXT: ret void
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}
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define void @test_simplify3(%FILE* %fp) {
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; CHECK: @test_simplify3
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%str = getelementptr inbounds [0 x i8]* @empty, i64 0, i64 0
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call i64 @fwrite(i8* %str, i64 0, i64 1, %FILE* %fp)
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ret void
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; CHECK-NEXT: ret void
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}
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define i64 @test_no_simplify1(%FILE* %fp) {
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; CHECK: @test_no_simplify1
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%str = getelementptr inbounds [1 x i8]* @str, i64 0, i64 0
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%ret = call i64 @fwrite(i8* %str, i64 1, i64 1, %FILE* %fp)
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; CHECK-NEXT: call i64 @fwrite
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ret i64 %ret
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; CHECK-NEXT: ret i64 %ret
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}
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define void @test_no_simplify2(%FILE* %fp, i64 %size) {
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; CHECK: @test_no_simplify2
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%str = getelementptr inbounds [1 x i8]* @str, i64 0, i64 0
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call i64 @fwrite(i8* %str, i64 %size, i64 1, %FILE* %fp)
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; CHECK-NEXT: call i64 @fwrite
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ret void
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; CHECK-NEXT: ret void
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}
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