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authorDan Albert <danalbert@google.com>2014-12-10 10:05:21 -0800
committerDan Albert <danalbert@google.com>2014-12-10 10:05:21 -0800
commit5a119335f700251983d9c7da31bdfe17532334b2 (patch)
tree8fb36d3910e3ee4c4e1b7422f4f017108efc52f5 /test/CodeGen/X86
parenta3a36cf628f1b0f3980bdb28c103c0e776288da9 (diff)
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Reset to master.
Various automerger/conflict resolution shenanigans have made this branch no longer match AOSP. Bring them back into sync. Change-Id: I4117ea6a323068945f237edc0ce0f51e171d4bae
Diffstat (limited to 'test/CodeGen/X86')
-rw-r--r--test/CodeGen/X86/critical-anti-dep-breaker.ll28
1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/X86/critical-anti-dep-breaker.ll b/test/CodeGen/X86/critical-anti-dep-breaker.ll
new file mode 100644
index 0000000..32d3f49
--- /dev/null
+++ b/test/CodeGen/X86/critical-anti-dep-breaker.ll
@@ -0,0 +1,28 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -relocation-model=pic -post-RA-scheduler=1 -break-anti-dependencies=critical | FileCheck %s
+
+; PR20308 ( http://llvm.org/bugs/show_bug.cgi?id=20308 )
+; The critical-anti-dependency-breaker must not use register def information from a kill inst.
+; This test case expects such an instruction to appear as a comment with def info for RDI.
+; There is an anti-dependency (WAR) hazard using RAX using default reg allocation and scheduling.
+; The post-RA-scheduler and critical-anti-dependency breaker can eliminate that hazard using R10.
+; That is the first free register that isn't used as a param in the call to "@Image".
+
+@PartClass = external global i32
+@NullToken = external global i64
+
+; CHECK-LABEL: Part_Create:
+; CHECK-DAG: # kill: RDI<def>
+; CHECK-DAG: movq PartClass@GOTPCREL(%rip), %r10
+define i32 @Part_Create(i64* %Anchor, i32 %TypeNum, i32 %F, i32 %Z, i32* %Status, i64* %PartTkn) {
+ %PartObj = alloca i64*, align 8
+ %Vchunk = alloca i64, align 8
+ %1 = load i64* @NullToken, align 4
+ store i64 %1, i64* %Vchunk, align 8
+ %2 = load i32* @PartClass, align 4
+ call i32 @Image(i64* %Anchor, i32 %2, i32 0, i32 0, i32* %Status, i64* %PartTkn, i64** %PartObj)
+ call i32 @Create(i64* %Anchor)
+ ret i32 %2
+}
+
+declare i32 @Image(i64*, i32, i32, i32, i32*, i64*, i64**)
+declare i32 @Create(i64*)