diff options
| author | Meador Inge <meadori@codesourcery.com> | 2012-11-26 00:24:07 +0000 |
|---|---|---|
| committer | Meador Inge <meadori@codesourcery.com> | 2012-11-26 00:24:07 +0000 |
| commit | dfb3b1a779c62c1ee41f9cddcaad0b89278052ae (patch) | |
| tree | 809db6e0fb93be4b0f656268dd396aa9ef419334 /test/Transforms/InstCombine/abs-1.ll | |
| parent | 15d099a790f3fd6f8f643c4e7c50a1659f4fc92b (diff) | |
| download | llvm-dfb3b1a779c62c1ee41f9cddcaad0b89278052ae.tar.gz llvm-dfb3b1a779c62c1ee41f9cddcaad0b89278052ae.tar.bz2 llvm-dfb3b1a779c62c1ee41f9cddcaad0b89278052ae.tar.xz | |
instcombine: Migrate *abs optimizations
This patch migrates the *abs optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168574 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/abs-1.ll')
| -rw-r--r-- | test/Transforms/InstCombine/abs-1.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/abs-1.ll b/test/Transforms/InstCombine/abs-1.ll new file mode 100644 index 0000000000..807f238755 --- /dev/null +++ b/test/Transforms/InstCombine/abs-1.ll @@ -0,0 +1,41 @@ +; Test that the abs library call simplifier works correctly. +; +; RUN: opt < %s -instcombine -S | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" + +declare i32 @abs(i32) +declare i64 @labs(i64) +declare i64 @llabs(i64) + +; Check abs(x) -> x >s -1 ? x : -x. + +define i32 @test_simplify1(i32 %x) { +; CHECK: @test_simplify1 + %ret = call i32 @abs(i32 %x) +; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i32 %x, -1 +; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i32 0, %x +; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i32 %x, i32 [[NEG]] + ret i32 %ret +; CHECK-NEXT: ret i32 [[RET]] +} + +define i64 @test_simplify2(i64 %x) { +; CHECK: @test_simplify2 + %ret = call i64 @labs(i64 %x) +; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i64 %x, -1 +; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i64 0, %x +; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i64 %x, i64 [[NEG]] + ret i64 %ret +; CHECK-NEXT: ret i64 [[RET]] +} + +define i64 @test_simplify3(i64 %x) { +; CHECK: @test_simplify3 + %ret = call i64 @llabs(i64 %x) +; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i64 %x, -1 +; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i64 0, %x +; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i64 %x, i64 [[NEG]] + ret i64 %ret +; CHECK-NEXT: ret i64 [[RET]] +} |