From fffe3634933471ee9805412ffa221080c9e9e8fd Mon Sep 17 00:00:00 2001 From: Eric Christopher Date: Fri, 11 Jan 2013 18:12:39 +0000 Subject: For inline asm: - recognize string "{memory}" in the MI generation - mark as mayload/maystore when there's a memory clobber constraint. PR14859. Patch by Krzysztof Parzyszek git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172228 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/Generic/inline-asm-mem-clobber.ll | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 test/CodeGen/Generic/inline-asm-mem-clobber.ll (limited to 'test/CodeGen/Generic') diff --git a/test/CodeGen/Generic/inline-asm-mem-clobber.ll b/test/CodeGen/Generic/inline-asm-mem-clobber.ll new file mode 100644 index 0000000..e523d03 --- /dev/null +++ b/test/CodeGen/Generic/inline-asm-mem-clobber.ll @@ -0,0 +1,21 @@ +; RUN: llc -O2 < %s | FileCheck %s + +@G = common global i32 0, align 4 + +define i32 @foo(i8* %p) nounwind uwtable { +entry: + %p.addr = alloca i8*, align 8 + %rv = alloca i32, align 4 + store i8* %p, i8** %p.addr, align 8 + store i32 0, i32* @G, align 4 + %0 = load i8** %p.addr, align 8 +; CHECK: blah + %1 = call i32 asm "blah", "=r,r,~{memory}"(i8* %0) nounwind +; CHECK: @G + store i32 %1, i32* %rv, align 4 + %2 = load i32* %rv, align 4 + %3 = load i32* @G, align 4 + %add = add nsw i32 %2, %3 + ret i32 %add +} + -- cgit v1.1