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Diffstat (limited to 'test/CodeGen/X86/machine-cp.ll')
-rw-r--r-- | test/CodeGen/X86/machine-cp.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/CodeGen/X86/machine-cp.ll b/test/CodeGen/X86/machine-cp.ll new file mode 100644 index 0000000000..54fa01c38f --- /dev/null +++ b/test/CodeGen/X86/machine-cp.ll @@ -0,0 +1,36 @@ +; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s | FileCheck %s + +; After tail duplication, two copies in an early exit BB can be cancelled out. +; rdar://10640363 +define i32 @t1(i32 %a, i32 %b) nounwind { +entry: +; CHECK: t1: +; CHECK: jne + %cmp1 = icmp eq i32 %b, 0 + br i1 %cmp1, label %while.end, label %while.body + +; CHECK: BB +; CHECK-NOT: mov +; CHECK: ret + +while.body: ; preds = %entry, %while.body + %a.addr.03 = phi i32 [ %b.addr.02, %while.body ], [ %a, %entry ] + %b.addr.02 = phi i32 [ %rem, %while.body ], [ %b, %entry ] + %rem = srem i32 %a.addr.03, %b.addr.02 + %cmp = icmp eq i32 %rem, 0 + br i1 %cmp, label %while.end, label %while.body + +while.end: ; preds = %while.body, %entry + %a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %b.addr.02, %while.body ] + ret i32 %a.addr.0.lcssa +} + +; Two movdqa (from phi-elimination) in the entry BB cancels out. +; rdar://10428165 +define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone { +entry: +; CHECK: t2: +; CHECK-NOT: movdqa + %tmp8 = shufflevector <8 x i16> %T0, <8 x i16> %T1, <8 x i32> < i32 undef, i32 undef, i32 7, i32 2, i32 8, i32 undef, i32 undef , i32 undef > + ret <8 x i16> %tmp8 +} |