f952bc05fd
Required for D140210 in order to disable FuncSpec at {Os, Oz}
optimization levels.
Differential Revision: https://reviews.llvm.org/D140564
35 lines
902 B
LLVM
35 lines
902 B
LLVM
; RUN: opt -passes="ipsccp<func-spec>" -force-function-specialization -func-specialization-max-iters=2 -S < %s | FileCheck %s
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; Duplicate store preventing recursive specialisation:
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;
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; CHECK: @recursiveFunc.1
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; CHECK-NOT: @recursiveFunc.2
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@Global = internal constant i32 1, align 4
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define internal void @recursiveFunc(ptr nocapture readonly %arg) {
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%temp = alloca i32, align 4
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%arg.load = load i32, ptr %arg, align 4
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%arg.cmp = icmp slt i32 %arg.load, 4
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br i1 %arg.cmp, label %block6, label %ret.block
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block6:
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call void @print_val(i32 %arg.load)
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%arg.add = add nsw i32 %arg.load, 1
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store i32 %arg.add, ptr %temp, align 4
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store i32 %arg.add, ptr %temp, align 4
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call void @recursiveFunc(ptr nonnull %temp)
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br label %ret.block
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ret.block:
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ret void
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}
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define i32 @main() {
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call void @recursiveFunc(ptr nonnull @Global)
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ret i32 0
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}
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declare dso_local void @print_val(i32)
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