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Improve constant folding of undef for binary operators.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134221 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2011-07-01 00:42:17 +00:00
parent d5dc9eca2b
commit 30cb6dda5a
2 changed files with 123 additions and 4 deletions
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99
test/Transforms/InstSimplify/binop.ll Normal file
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@@ -0,0 +1,99 @@
; RUN: opt -instsimplify -S < %s | FileCheck %s
; @test0
; CHECK: ret i64 undef
define i64 @test0() {
%r = mul i64 undef, undef
ret i64 %r
}
; @test1
; CHECK: ret i64 undef
define i64 @test1() {
%r = mul i64 3, undef
ret i64 %r
}
; @test2
; CHECK: ret i64 undef
define i64 @test2() {
%r = mul i64 undef, 3
ret i64 %r
}
; @test3
; CHECK: ret i64 0
define i64 @test3() {
%r = mul i64 undef, 6
ret i64 %r
}
; @test4
; CHECK: ret i64 0
define i64 @test4() {
%r = mul i64 6, undef
ret i64 %r
}
; @test5
; CHECK: ret i64 undef
define i64 @test5() {
%r = and i64 undef, undef
ret i64 %r
}
; @test6
; CHECK: ret i64 undef
define i64 @test6() {
%r = or i64 undef, undef
ret i64 %r
}
; @test7
; CHECK: ret i64 undef
define i64 @test7() {
%r = udiv i64 undef, 1
ret i64 %r
}
; @test8
; CHECK: ret i64 undef
define i64 @test8() {
%r = sdiv i64 undef, 1
ret i64 %r
}
; @test9
; CHECK: ret i64 0
define i64 @test9() {
%r = urem i64 undef, 1
ret i64 %r
}
; @test10
; CHECK: ret i64 0
define i64 @test10() {
%r = srem i64 undef, 1
ret i64 %r
}
; @test11
; CHECK: ret i64 undef
define i64 @test11() {
%r = shl i64 undef, undef
ret i64 %r
}
; @test12
; CHECK: ret i64 undef
define i64 @test12() {
%r = ashr i64 undef, undef
ret i64 %r
}
; @test13
; CHECK: ret i64 undef
define i64 @test13() {
%r = lshr i64 undef, undef
ret i64 %r
}