5b6b090cf2
We need to update this code before introducing an 'fneg' instruction in IR, so we might as well kill off the integer neg/not queries too. This is no-functional-change-intended for scalar code and most vector code. For vectors, we can see that the 'match' API allows for undef elements in constants, so we optimize those cases better. Ideally, there would be a test for each code diff, but I don't see evidence of that for the existing code, so I didn't try very hard to come up with new vector tests for each code change. Differential Revision: https://reviews.llvm.org/D53533 llvm-svn: 345042
47 lines
1.3 KiB
LLVM
47 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
|
|
|
|
; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
|
|
|
|
define i32 @test1(i32 %a, i32 %b, i32 %z) {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], 12345
|
|
; CHECK-NEXT: [[F:%.*]] = mul i32 [[E]], [[B:%.*]]
|
|
; CHECK-NEXT: [[G:%.*]] = mul i32 [[F]], [[Z:%.*]]
|
|
; CHECK-NEXT: ret i32 [[G]]
|
|
;
|
|
%c = sub i32 0, %z
|
|
%d = mul i32 %a, %b
|
|
%e = mul i32 %c, %d
|
|
%f = mul i32 %e, 12345
|
|
%g = sub i32 0, %f
|
|
ret i32 %g
|
|
}
|
|
|
|
define i32 @test2(i32 %a, i32 %b, i32 %z) {
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], 40
|
|
; CHECK-NEXT: [[F:%.*]] = mul i32 [[E]], [[Z:%.*]]
|
|
; CHECK-NEXT: ret i32 [[F]]
|
|
;
|
|
%d = mul i32 %z, 40
|
|
%c = sub i32 0, %d
|
|
%e = mul i32 %a, %c
|
|
%f = sub i32 0, %e
|
|
ret i32 %f
|
|
}
|
|
|
|
define <2 x i32> @negate_vec_undefs(<2 x i32> %a, <2 x i32> %b, <2 x i32> %z) {
|
|
; CHECK-LABEL: @negate_vec_undefs(
|
|
; CHECK-NEXT: [[E:%.*]] = mul <2 x i32> [[A:%.*]], <i32 40, i32 40>
|
|
; CHECK-NEXT: [[F:%.*]] = mul <2 x i32> [[E]], [[Z:%.*]]
|
|
; CHECK-NEXT: ret <2 x i32> [[F]]
|
|
;
|
|
%d = mul <2 x i32> %z, <i32 40, i32 40>
|
|
%c = sub <2 x i32> <i32 0, i32 undef>, %d
|
|
%e = mul <2 x i32> %a, %c
|
|
%f = sub <2 x i32> <i32 0, i32 undef>, %e
|
|
ret <2 x i32> %f
|
|
}
|
|
|