1a525dec7f
When collecting the possible constant arguments to specialise a function the compiler will abandon the search on the first argument that is for some reason unsuitable as a specialisation constant. Thus, depending on the traversal order of the functions and call sites, the compiler can end up with a different set of possible constants, hence with different set of specialisations. With this patch, the compiler will skip unsuitable constants, but nevertheless will continue searching for more. Reviewed By: ChuanqiXu Differential Revision: https://reviews.llvm.org/D135867
43 lines
1.0 KiB
LLVM
43 lines
1.0 KiB
LLVM
; RUN: opt -S --passes=function-specialization < %s | FileCheck %s
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define dso_local i32 @p0(i32 noundef %x) {
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entry:
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%add = add nsw i32 %x, 1
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ret i32 %add
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}
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define dso_local i32 @p1(i32 noundef %x) {
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entry:
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%sub = add nsw i32 %x, -1
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ret i32 %sub
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}
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define dso_local i32 @g0(i32 noundef %x) {
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entry:
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%call = tail call fastcc i32 @f(i32 noundef %x, ptr noundef nonnull @p0)
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ret i32 %call
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}
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define internal fastcc i32 @f(i32 noundef %x, ptr nocapture noundef readonly %p) noinline {
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entry:
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%call = tail call i32 %p(i32 noundef %x)
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%add = add nsw i32 %call, %x
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ret i32 %add
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}
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define dso_local i32 @g1(i32 noundef %x) {
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entry:
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%call = tail call fastcc i32 @f(i32 noundef %x, ptr noundef nonnull @p1)
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ret i32 %call
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}
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define dso_local i32 @g2(i32 noundef %x) {
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entry:
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%call = tail call fastcc i32 @f(i32 noundef %x, ptr poison)
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ret i32 %call
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}
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; Check that a single argument, that cannot be used for specialisation, does not
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; prevent specialisation based on other arguments.
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; CHECK: @f.1
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; CHECK: @f.2
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