[PowerPC] Fix failure with STBRX when store is narrower than the bswap
Fixes a crash caused by r296811 by truncating the input of the STBRX node
when the bswap is wider than i32.
Fixes https://bugs.llvm.org/show_bug.cgi?id=32140
Differential Revision: https://reviews.llvm.org/D30615
llvm-svn: 297001
diff --git a/llvm/test/CodeGen/PowerPC/pr32140.ll b/llvm/test/CodeGen/PowerPC/pr32140.ll
new file mode 100644
index 0000000..827a904
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/pr32140.ll
@@ -0,0 +1,59 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=powerpc64le-linux-gnu -mcpu=pwr8 < %s | FileCheck %s
+; RUN: llc -mtriple=powerpc64-linux-gnu -mcpu=pwr8 < %s | FileCheck %s
+
+@as = common local_unnamed_addr global i16 0, align 2
+@bs = common local_unnamed_addr global i16 0, align 2
+@ai = common local_unnamed_addr global i32 0, align 4
+@bi = common local_unnamed_addr global i32 0, align 4
+
+define void @bswapStorei64Toi32() {
+; CHECK-LABEL: bswapStorei64Toi32:
+; CHECK: # BB#0: # %entry
+; CHECK: lwa 3, 0(3)
+; CHECK-NEXT: rldicl 3, 3, 32, 32
+; CHECK-NEXT: stwbrx 3, 0, 4
+; CHECK-NEXT: blr
+entry:
+ %0 = load i32, i32* @ai, align 4
+ %conv.i = sext i32 %0 to i64
+ %or26.i = tail call i64 @llvm.bswap.i64(i64 %conv.i)
+ %conv = trunc i64 %or26.i to i32
+ store i32 %conv, i32* @bi, align 4
+ ret void
+}
+
+define void @bswapStorei32Toi16() {
+; CHECK-LABEL: bswapStorei32Toi16:
+; CHECK: # BB#0: # %entry
+; CHECK: lha 3, 0(3)
+; CHECK-NEXT: srwi 3, 3, 16
+; CHECK-NEXT: sthbrx 3, 0, 4
+; CHECK-NEXT: blr
+entry:
+ %0 = load i16, i16* @as, align 2
+ %conv.i = sext i16 %0 to i32
+ %or26.i = tail call i32 @llvm.bswap.i32(i32 %conv.i)
+ %conv = trunc i32 %or26.i to i16
+ store i16 %conv, i16* @bs, align 2
+ ret void
+}
+
+define void @bswapStorei64Toi16() {
+; CHECK-LABEL: bswapStorei64Toi16:
+; CHECK: # BB#0: # %entry
+; CHECK: lha 3, 0(3)
+; CHECK-NEXT: rldicl 3, 3, 16, 48
+; CHECK-NEXT: sthbrx 3, 0, 4
+; CHECK-NEXT: blr
+entry:
+ %0 = load i16, i16* @as, align 2
+ %conv.i = sext i16 %0 to i64
+ %or26.i = tail call i64 @llvm.bswap.i64(i64 %conv.i)
+ %conv = trunc i64 %or26.i to i16
+ store i16 %conv, i16* @bs, align 2
+ ret void
+}
+
+declare i32 @llvm.bswap.i32(i32)
+declare i64 @llvm.bswap.i64(i64)