35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; Test that the puts 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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@empty = constant [1 x i8] zeroinitializer
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declare i32 @puts(i8*)
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; Check puts("") -> putchar('\n').
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define void @test_simplify1() {
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; CHECK-LABEL: @test_simplify1(
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; CHECK-NEXT: [[PUTCHAR:%.*]] = call i32 @putchar(i32 10)
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; CHECK-NEXT: ret void
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;
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%str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
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call i32 @puts(i8* %str)
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ret void
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}
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; Don't simplify if the return value is used.
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define i32 @test_no_simplify1() {
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; CHECK-LABEL: @test_no_simplify1(
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; CHECK-NEXT: [[RET:%.*]] = call i32 @puts(i8* noundef nonnull dereferenceable(1) getelementptr inbounds ([1 x i8], [1 x i8]* @empty, i32 0, i32 0))
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; CHECK-NEXT: ret i32 [[RET]]
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;
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%str = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
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%ret = call i32 @puts(i8* %str)
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ret i32 %ret
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}
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