Don't drop alignment info on local common symbols.
- On COFF the .lcomm directive has an alignment argument.
- On ELF we fall back to .local + .comm
Based on a patch by NAKAMURA Takumi.
Fixes PR9337, PR9483 and PR10128.
llvm-svn: 138976
diff --git a/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll b/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll
index a4bab85..5cfbb4f 100644
--- a/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll
+++ b/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll
@@ -5,7 +5,7 @@
@dummy = internal global i32 666
-@array00 = internal global [20 x i32] zeroinitializer
+@array00 = internal global [80 x i8] zeroinitializer, align 1
@sum = internal global i32 55
@STRIDE = internal global i32 8
@@ -28,8 +28,9 @@
define i32 @main(i32 %argc) nounwind {
%1 = load i32* @sum, align 4
- %2 = getelementptr [20 x i32]* @array00, i32 0, i32 %argc
- %3 = load i32* %2, align 4
- %4 = add i32 %1, %3
- ret i32 %4;
+ %2 = getelementptr [80 x i8]* @array00, i32 0, i32 %argc
+ %3 = load i8* %2
+ %4 = zext i8 %3 to i32
+ %5 = add i32 %1, %4
+ ret i32 %5
}
diff --git a/llvm/test/CodeGen/ARM/elf-lcomm-align.ll b/llvm/test/CodeGen/ARM/elf-lcomm-align.ll
new file mode 100644
index 0000000..4679299
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/elf-lcomm-align.ll
@@ -0,0 +1,14 @@
+; RUN: llc < %s -mtriple=arm-linux-gnueabi -O0 | FileCheck %s
+; run with -O0 to avoid arm global merging.
+
+@c = internal global i8 0, align 1
+@x = internal global i32 0, align 4
+
+; CHECK: .lcomm c,1
+; .lcomm doesn't support alignment.
+; CHECK: .local x
+; CHECK-NEXT: .comm x,4,4
+
+define i32 @foo() nounwind {
+ ret i32 sub (i32 ptrtoint (i8* @c to i32), i32 ptrtoint (i32* @x to i32))
+}