From: Krzysztof Parzyszek <kparzysz@codeaurora.org>
Date: Tue, 7 Mar 2017 14:20:19 +0000 (+0000)
Subject: [Hexagon] Do not insert instructions before PHI nodes
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c1af14f0c1ca2fd5606eb5c1f4a370606952bc32;p=llvm

[Hexagon] Do not insert instructions before PHI nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297141 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/Hexagon/HexagonBitSimplify.cpp b/lib/Target/Hexagon/HexagonBitSimplify.cpp
index 79787463684..a155762cd4a 100644
--- a/lib/Target/Hexagon/HexagonBitSimplify.cpp
+++ b/lib/Target/Hexagon/HexagonBitSimplify.cpp
@@ -2375,7 +2375,9 @@ bool BitSimplification::simplifyExtractLow(MachineInstr *MI,
     DebugLoc DL = MI->getDebugLoc();
     MachineBasicBlock &B = *MI->getParent();
     unsigned NewR = MRI.createVirtualRegister(FRC);
-    auto MIB = BuildMI(B, MI, DL, HII.get(ExtOpc), NewR)
+    auto At = MI->isPHI() ? B.getFirstNonPHI()
+                          : MachineBasicBlock::iterator(MI);
+    auto MIB = BuildMI(B, At, DL, HII.get(ExtOpc), NewR)
                   .addReg(R, 0, SR);
     switch (ExtOpc) {
       case Hexagon::A2_sxtb:
diff --git a/test/CodeGen/Hexagon/bit-phi.ll b/test/CodeGen/Hexagon/bit-phi.ll
index 86b18d8bf25..7abfba079bb 100644
--- a/test/CodeGen/Hexagon/bit-phi.ll
+++ b/test/CodeGen/Hexagon/bit-phi.ll
@@ -1,4 +1,5 @@
 ; RUN: llc -march=hexagon < %s
+; RUN: llc -march=hexagon -disable-hcp < %s
 ; REQUIRES: asserts
 
 target datalayout = "e-m:e-p:32:32-i1:32-i64:64-a:0-v32:32-n16:32"