It's not necessary to do rounding for alloca operations when the requested

alignment is equal to the stack alignment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 0 deletions

diff --git a/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll b/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll
new file mode 100644
index 0000000..2c67980
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/dont_reduce_bytes.ll
@@ -0,0 +1,21 @@
+; Don't reduce the byte access to P[i], at least not on targets that 
+; support an efficient 'mem[r1+r2]' addressing mode.
+
+; RUN: llvm-upgrade < %s | llvm-as | opt -loop-reduce -disable-output
+
+declare bool %pred(int)
+
+void %test(sbyte* %PTR) {
+	br label %Loop
+Loop:
+	%INDVAR = phi int [0, %0], [%INDVAR2, %Loop]
+
+	%STRRED = getelementptr sbyte* %PTR, int %INDVAR
+	store sbyte 0, sbyte* %STRRED
+
+	%INDVAR2 = add int %INDVAR, 1
+	%cond = call bool %pred(int %INDVAR2)  ;; cannot eliminate indvar
+	br bool %cond, label %Loop, label %Out
+Out:
+	ret void
+}