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author | Dimitry Andric <dim@FreeBSD.org> | 2013-04-08 18:41:23 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2013-04-08 18:41:23 +0000 |
commit | 4a16efa3e43e35f0cc9efe3a67f620f0017c3d36 (patch) | |
tree | 06099edc18d30894081a822b756f117cbe0b8207 /test/CodeGen/X86/clobber-fi0.ll | |
parent | 482e7bddf617ae804dc47133cb07eb4aa81e45de (diff) | |
download | src-test-4a16efa3e43e35f0cc9efe3a67f620f0017c3d36.tar.gz src-test-4a16efa3e43e35f0cc9efe3a67f620f0017c3d36.zip |
Notes
Diffstat (limited to 'test/CodeGen/X86/clobber-fi0.ll')
-rw-r--r-- | test/CodeGen/X86/clobber-fi0.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/CodeGen/X86/clobber-fi0.ll b/test/CodeGen/X86/clobber-fi0.ll new file mode 100644 index 0000000000000..38a42dbf1aa16 --- /dev/null +++ b/test/CodeGen/X86/clobber-fi0.ll @@ -0,0 +1,37 @@ +; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux | FileCheck %s + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.7.0" + +; In the code below we need to copy the EFLAGS because of scheduling constraints. +; When copying the EFLAGS we need to write to the stack with push/pop. This forces +; us to emit the prolog. + +; CHECK: main +; CHECK: subq{{.*}}rsp +; CHECK: ret +define i32 @main(i32 %arg, i8** %arg1) nounwind { +bb: + %tmp = alloca i32, align 4 ; [#uses=3 type=i32*] + %tmp2 = alloca i32, align 4 ; [#uses=3 type=i32*] + %tmp3 = alloca i32 ; [#uses=1 type=i32*] + store i32 1, i32* %tmp, align 4 + store i32 1, i32* %tmp2, align 4 + br label %bb4 + +bb4: ; preds = %bb4, %bb + %tmp6 = load i32* %tmp2, align 4 ; [#uses=1 type=i32] + %tmp7 = add i32 %tmp6, -1 ; [#uses=2 type=i32] + store i32 %tmp7, i32* %tmp2, align 4 + %tmp8 = icmp eq i32 %tmp7, 0 ; [#uses=1 type=i1] + %tmp9 = load i32* %tmp ; [#uses=1 type=i32] + %tmp10 = add i32 %tmp9, -1 ; [#uses=1 type=i32] + store i32 %tmp10, i32* %tmp3 + br i1 %tmp8, label %bb11, label %bb4 + +bb11: ; preds = %bb4 + %tmp12 = load i32* %tmp, align 4 ; [#uses=1 type=i32] + ret i32 %tmp12 +} + + |