diff options
Diffstat (limited to 'llvm/test/CodeGen/PowerPC/ppc-redzone-alignment-bug.ll')
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/ppc-redzone-alignment-bug.ll | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/ppc-redzone-alignment-bug.ll b/llvm/test/CodeGen/PowerPC/ppc-redzone-alignment-bug.ll new file mode 100644 index 00000000000..87b45beeab7 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/ppc-redzone-alignment-bug.ll @@ -0,0 +1,32 @@ +; Note the formula for negative number alignment calculation should be y = x & ~(n-1) rather than y = (x + (n-1)) & ~(n-1). +; after patch https://reviews.llvm.org/D34337, we could save 16 bytes in the best case. +; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 < %s | FileCheck %s -check-prefix=CHECK-BE +; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr8 < %s | FileCheck %s -check-prefix=CHECK-LE + +define signext i32 @bar(i32 signext %ii) { +entry: + %0 = tail call i32 asm sideeffect "add $0, $1, $2\0A", "=r,r,r,~{f14},~{r15},~{v20}"(i32 %ii, i32 10) + ret i32 %0 +; Before the fix by patch D34337: +; stdu 1, -544(1) +; std 15, 264(1) +; stfd 14, 400(1) +; stdu 1, -560(1) +; std 15, 280(1) +; stfd 14, 416(1) + +; After the fix by patch D34337: +; CHECK-LE: stdu 1, -528(1) +; CHECK-LE:std 15, 248(1) +; CHECK-LE:stfd 14, 384(1) +; CHECK-BE: stdu 1, -544(1) +; CHECK-BE:std 15, 264(1) +; CHECK-BE:stfd 14, 400(1) +} + +define signext i32 @foo() { +entry: + %call = tail call signext i32 @bar(i32 signext 5) + ret i32 %call +} + |
