diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-02-26 07:04:54 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-02-26 07:04:54 +0000 |
| commit | 0254e7033a1d879357e582dcdc1943e656192768 (patch) | |
| tree | 239334a199905e3921187f7b1936da02a8940465 /test/CodeGen/Generic | |
| parent | 9bf12b5583104c810cfadcdce91edf9efad79973 (diff) | |
Fix isNegatibleForFree to not return true for ConstantFP nodes
after legalize. Just because a constant is legal (e.g. 0.0 in SSE)
doesn't mean that its negated value is legal (-0.0). We could make
this stronger by checking to see if the negated constant is actually
legal post negation, but it doesn't seem like a big deal.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47591 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/Generic')
| -rw-r--r-- | test/CodeGen/Generic/2008-02-25-NegateZero.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/Generic/2008-02-25-NegateZero.ll b/test/CodeGen/Generic/2008-02-25-NegateZero.ll new file mode 100644 index 0000000000..e5a5274846 --- /dev/null +++ b/test/CodeGen/Generic/2008-02-25-NegateZero.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | llc +; rdar://5763967 + +define void @test() { +entry: + %tmp98 = load float* null, align 4 ; <float> [#uses=1] + %tmp106 = load float* null, align 4 ; <float> [#uses=1] + %tmp113 = add float %tmp98, %tmp106 ; <float> [#uses=1] + %tmp119 = sub float %tmp113, 0.000000e+00 ; <float> [#uses=1] + call void (i32, ...)* @foo( i32 0, float 0.000000e+00, float %tmp119 ) nounwind + ret void +} + +declare void @foo(i32, ...) |