Fix incorrect invariant check in DAG Combine

Earlier this summer I fixed an issue where we were incorrectly combining
multiple loads that had different constraints such alignment, invariance,
temporality, etc. Apparently in one case I made copt paste error and swapped
alignment and invariance.

Tests included.

rdar://18816719

llvm-svn: 220933

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AArch64/dag-combine-invaraints.ll b/llvm/test/CodeGen/AArch64/dag-combine-invaraints.ll
new file mode 100644
index 00000000000..115fc64174c
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/dag-combine-invaraints.ll
@@ -0,0 +1,36 @@
+; RUN: llc -mtriple=arm64-apple-darwin8.0 -relocation-model=pic -O1 < %s | FileCheck %s
+
+@.str2 = private unnamed_addr constant [9 x i8] c"_%d____\0A\00", align 1
+
+; Function Attrs: nounwind ssp
+define i32 @main(i32 %argc, i8** %argv) #0 {
+main_:
+  %tmp = alloca i32, align 4
+  %i32T = alloca i32, align 4
+  %i32F = alloca i32, align 4
+  %i32X = alloca i32, align 4
+  store i32 0, i32* %tmp
+  store i32 15, i32* %i32T, align 4
+  store i32 5, i32* %i32F, align 4
+  %tmp6 = load i32* %tmp, align 4
+  %tmp7 = icmp ne i32 %tmp6, 0
+  %tmp8 = xor i1 %tmp7, true
+  %tmp9 = load i32* %i32T, align 4
+  %tmp10 = load i32* %i32F, align 4
+  %DHSelect = select i1 %tmp8, i32 %tmp9, i32 %tmp10
+  store i32 %DHSelect, i32* %i32X, align 4
+  %tmp15 = load i32* %i32X, align 4
+  %tmp17 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([9 x i8]* @.str2, i32 0, i32 0), i32 %tmp15)
+  ret i32 0
+
+; CHECK: main:
+; CHECK-DAG: movz
+; CHECK-DAG: orr
+; CHECK: csel
+}
+
+
+declare i32 @printf(i8*, ...) #1
+
+attributes #0 = { nounwind ssp "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }