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| author | Sanjay Patel <spatel@rotateright.com> | 2017-05-07 15:11:40 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2017-05-07 15:11:40 +0000 |
| commit | 599e65b1ff51d4f92ebf68696adb0955788db051 (patch) | |
| tree | a7fb8f32590fa1f86a592c4e2b946525b671b17e /llvm/test/Transforms/InstCombine | |
| parent | 5305d3933a55f7153971821b9c7194a080b6b699 (diff) | |
| download | bcm5719-llvm-599e65b1ff51d4f92ebf68696adb0955788db051.tar.gz bcm5719-llvm-599e65b1ff51d4f92ebf68696adb0955788db051.zip | |
[InstSimplify] use ConstantRange to simplify or-of-icmps
We can simplify (or (icmp X, C1), (icmp X, C2)) to 'true' or one of the icmps in many cases.
I had to check some of these with Alive to prove to myself it's right, but everything seems
to check out. Eg, the deleted code in instcombine was completely ignoring predicates with
mismatched signedness.
This is a follow-up to:
https://reviews.llvm.org/rL301260
https://reviews.llvm.org/D32143
llvm-svn: 302370
Diffstat (limited to 'llvm/test/Transforms/InstCombine')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll | 14 | ||||
| -rw-r--r-- | llvm/test/Transforms/InstCombine/and-or-icmps.ll | 4 | ||||
| -rw-r--r-- | llvm/test/Transforms/InstCombine/or.ll | 11 |
3 files changed, 1 insertions, 28 deletions
diff --git a/llvm/test/Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll b/llvm/test/Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll deleted file mode 100644 index 9c989b9ecf8..00000000000 --- a/llvm/test/Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll +++ /dev/null @@ -1,14 +0,0 @@ -; RUN: opt < %s -instcombine -S | \ -; RUN: grep "ret i1 true" -; PR586 - -@g_07918478 = external global i32 ; <i32*> [#uses=1] - -define i1 @test() { - %tmp.0 = load i32, i32* @g_07918478 ; <i32> [#uses=2] - %tmp.1 = icmp ne i32 %tmp.0, 0 ; <i1> [#uses=1] - %tmp.4 = icmp ult i32 %tmp.0, 4111 ; <i1> [#uses=1] - %bothcond = or i1 %tmp.1, %tmp.4 ; <i1> [#uses=1] - ret i1 %bothcond -} - diff --git a/llvm/test/Transforms/InstCombine/and-or-icmps.ll b/llvm/test/Transforms/InstCombine/and-or-icmps.ll index 464f390f988..165f5d1bffe 100644 --- a/llvm/test/Transforms/InstCombine/and-or-icmps.ll +++ b/llvm/test/Transforms/InstCombine/and-or-icmps.ll @@ -15,9 +15,7 @@ define i1 @PR1817_1(i32 %X) { define i1 @PR1817_2(i32 %X) { ; CHECK-LABEL: @PR1817_2( ; CHECK-NEXT: [[A:%.*]] = icmp slt i32 %X, 10 -; CHECK-NEXT: [[B:%.*]] = icmp ult i32 %X, 10 -; CHECK-NEXT: [[C:%.*]] = or i1 [[A]], [[B]] -; CHECK-NEXT: ret i1 [[C]] +; CHECK-NEXT: ret i1 [[A]] ; %A = icmp slt i32 %X, 10 %B = icmp ult i32 %X, 10 diff --git a/llvm/test/Transforms/InstCombine/or.ll b/llvm/test/Transforms/InstCombine/or.ll index 9ae5eafdfcc..bfafd66ebb4 100644 --- a/llvm/test/Transforms/InstCombine/or.ll +++ b/llvm/test/Transforms/InstCombine/or.ll @@ -661,17 +661,6 @@ define i1 @test47(i8 signext %c) { ret i1 %or } -define i1 @test48(i64 %x, i1 %b) { -; CHECK-LABEL: @test48( -; CHECK-NEXT: ret i1 true -; - %1 = icmp ult i64 %x, 2305843009213693952 - %2 = icmp ugt i64 %x, 2305843009213693951 - %.b = or i1 %2, %b - %3 = or i1 %1, %.b - ret i1 %3 -} - define i32 @test49(i1 %C) { ; CHECK-LABEL: @test49( ; CHECK-NEXT: [[V:%.*]] = select i1 [[C:%.*]], i32 1019, i32 123 |
