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llvm-mirror/test/CodeGen/NVPTX/minmax-negative.ll
Artur Gainullin 74f6ea6c18 Improve clamp recognition in ValueTracking.
Summary:
ValueTracking was recognizing not all variations of clamp. Swapping of
true value and false value of select was added to fix this problem. The
first patch was reverted because it caused miscompile in NVPTX target. 
Added corresponding test cases.

Reviewers: spatel, majnemer, efriedma, reames

Subscribers: llvm-commits, jholewinski

Differential Revision: https://reviews.llvm.org/D39240

llvm-svn: 316795
2017-10-27 20:53:41 +00:00

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255 B
LLVM

; RUN: llc < %s -march=nvptx -O0 | FileCheck %s
define i16 @test1(i16* %sur1) {
; CHECK-NOT: mov.u16 %rs{{[0-9]+}}, 32767
%_tmp21.i = icmp sle i16 0, 0
%_tmp22.i = select i1 %_tmp21.i, i16 0, i16 32767
store i16 %_tmp22.i, i16* %sur1
ret i16 0
}