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Imported Upstream version 5.18.0.205

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Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927
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Xamarin Public Jenkins (auto-signing)
2018-11-16 08:20:38 +00:00
parent 5cd5df71cc
commit 8e12397d70
28486 changed files with 3867013 additions and 66 deletions
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32
external/llvm/test/Transforms/InstCombine/preserve-sminmax.ll vendored Normal file
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; RUN: opt < %s -instcombine -S | FileCheck %s
; Instcombine normally would fold the sdiv into the comparison,
; making "icmp slt i32 %h, 2", but in this case the sdiv has
; another use, so it wouldn't a big win, and it would also
; obfuscate an otherise obvious smax pattern to the point where
; other analyses wouldn't recognize it.
define i32 @foo(i32 %h) {
%sd = sdiv i32 %h, 2
%t = icmp slt i32 %sd, 1
%r = select i1 %t, i32 %sd, i32 1
ret i32 %r
}
; CHECK: %sd = sdiv i32 %h, 2
; CHECK: %t = icmp slt i32 %sd, 1
; CHECK: %r = select i1 %t, i32 %sd, i32 1
; CHECK: ret i32 %r
define i32 @bar(i32 %h) {
%sd = sdiv i32 %h, 2
%t = icmp sgt i32 %sd, 1
%r = select i1 %t, i32 %sd, i32 1
ret i32 %r
}
; CHECK: %sd = sdiv i32 %h, 2
; CHECK: %t = icmp sgt i32 %sd, 1
; CHECK: %r = select i1 %t, i32 %sd, i32 1
; CHECK: ret i32 %r