diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/widen_load-0.ll | 21 | ||||
| -rw-r--r-- | test/CodeGen/X86/widen_load-1.ll | 45 |
3 files changed, 67 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp index 13f8ff7..67c63b2 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp @@ -1678,7 +1678,7 @@ SDValue DAGTypeLegalizer::WidenVecRes_LOAD(SDNode *N) { // Modified the chain - switch anything that used the old chain to use // the new one. - ReplaceValueWith(SDValue(N, 1), Chain); + ReplaceValueWith(SDValue(N, 1), NewChain); return Result; } diff --git a/test/CodeGen/X86/widen_load-0.ll b/test/CodeGen/X86/widen_load-0.ll new file mode 100644 index 0000000..f6c4af0 --- /dev/null +++ b/test/CodeGen/X86/widen_load-0.ll @@ -0,0 +1,21 @@ +; RUN: llc < %s -o - -march=x86-64 | FileCheck %s +; PR4891 + +; Both loads should happen before either store. + +; CHECK: movl (%rdi), %eax +; CHECK: movl (%rsi), %ecx +; CHECK: movl %ecx, (%rdi) +; CHECK: movl %eax, (%rsi) + +define void @short2_int_swap(<2 x i16>* nocapture %b, i32* nocapture %c) nounwind { +entry: + %0 = load <2 x i16>* %b, align 2 ; <<2 x i16>> [#uses=1] + %1 = load i32* %c, align 4 ; <i32> [#uses=1] + %tmp1 = bitcast i32 %1 to <2 x i16> ; <<2 x i16>> [#uses=1] + store <2 x i16> %tmp1, <2 x i16>* %b, align 2 + %tmp5 = bitcast <2 x i16> %0 to <1 x i32> ; <<1 x i32>> [#uses=1] + %tmp3 = extractelement <1 x i32> %tmp5, i32 0 ; <i32> [#uses=1] + store i32 %tmp3, i32* %c, align 4 + ret void +} diff --git a/test/CodeGen/X86/widen_load-1.ll b/test/CodeGen/X86/widen_load-1.ll new file mode 100644 index 0000000..2d34b31 --- /dev/null +++ b/test/CodeGen/X86/widen_load-1.ll @@ -0,0 +1,45 @@ +; RUN: llc %s -o - -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -disable-mmx | FileCheck %s +; PR4891 + +; This load should be before the call, not after. + +; CHECK: movq compl+128(%rip), %xmm0 +; CHECK: movaps %xmm0, (%rsp) +; CHECK: call killcommon + +@compl = linkonce global [20 x i64] zeroinitializer, align 64 ; <[20 x i64]*> [#uses=1] + +declare void @killcommon(i32* noalias) + +define void @reset(<2 x float>* noalias %garbage1) { +"file complex.c, line 27, bb1": + %changed = alloca i32, align 4 ; <i32*> [#uses=3] + br label %"file complex.c, line 27, bb13" + +"file complex.c, line 27, bb13": ; preds = %"file complex.c, line 27, bb1" + store i32 0, i32* %changed, align 4 + %r2 = getelementptr float* bitcast ([20 x i64]* @compl to float*), i64 32 ; <float*> [#uses=1] + %r3 = bitcast float* %r2 to <2 x float>* ; <<2 x float>*> [#uses=1] + %r4 = load <2 x float>* %r3, align 4 ; <<2 x float>> [#uses=1] + call void @killcommon(i32* %changed) + br label %"file complex.c, line 34, bb4" + +"file complex.c, line 34, bb4": ; preds = %"file complex.c, line 27, bb13" + %r5 = load i32* %changed, align 4 ; <i32> [#uses=1] + %r6 = icmp eq i32 %r5, 0 ; <i1> [#uses=1] + %r7 = zext i1 %r6 to i32 ; <i32> [#uses=1] + %r8 = icmp ne i32 %r7, 0 ; <i1> [#uses=1] + br i1 %r8, label %"file complex.c, line 34, bb7", label %"file complex.c, line 27, bb5" + +"file complex.c, line 27, bb5": ; preds = %"file complex.c, line 34, bb4" + br label %"file complex.c, line 35, bb6" + +"file complex.c, line 35, bb6": ; preds = %"file complex.c, line 27, bb5" + %r11 = ptrtoint <2 x float>* %garbage1 to i64 ; <i64> [#uses=1] + %r12 = inttoptr i64 %r11 to <2 x float>* ; <<2 x float>*> [#uses=1] + store <2 x float> %r4, <2 x float>* %r12, align 4 + br label %"file complex.c, line 34, bb7" + +"file complex.c, line 34, bb7": ; preds = %"file complex.c, line 35, bb6", %"file complex.c, line 34, bb4" + ret void +} |