GlobalISel: Implement widenScalar for implicit_def
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350695 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index facbafa..c6e5f3e 100644
--- a/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -884,6 +884,12 @@
Observer.changedInstr(MI);
return Legalized;
}
+ case TargetOpcode::G_IMPLICIT_DEF: {
+ Observer.changingInstr(MI);
+ widenScalarDst(MI, WideTy);
+ Observer.changedInstr(MI);
+ return Legalized;
+ }
case TargetOpcode::G_BRCOND:
Observer.changingInstr(MI);
widenScalarSrc(MI, WideTy, 0, TargetOpcode::G_ANYEXT);
diff --git a/test/CodeGen/AArch64/GlobalISel/legalize-undef.mir b/test/CodeGen/AArch64/GlobalISel/legalize-undef.mir
index e46c9ad..bbba95f 100644
--- a/test/CodeGen/AArch64/GlobalISel/legalize-undef.mir
+++ b/test/CodeGen/AArch64/GlobalISel/legalize-undef.mir
@@ -1,5 +1,5 @@
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -march=aarch64 -run-pass=legalizer %s -o - | FileCheck %s
+# RUN: llc -march=aarch64 -run-pass=legalizer -O0 %s -o - | FileCheck %s
---
name: test_implicit_def
body: |
@@ -16,3 +16,22 @@
%1:_(s64) = G_TRUNC %0(s128)
$x0 = COPY %1(s64)
...
+
+---
+name: test_implicit_def_s3
+body: |
+ bb.0:
+ liveins:
+
+ ; CHECK-LABEL: name: test_implicit_def_s3
+ ; CHECK: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 61
+ ; CHECK: [[DEF:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
+ ; CHECK: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[DEF]], [[C]]
+ ; CHECK: [[ASHR:%[0-9]+]]:_(s64) = G_ASHR [[SHL]], [[C]]
+ ; CHECK: $x0 = COPY [[ASHR]](s64)
+ %0:_(s3) = G_IMPLICIT_DEF
+ %1:_(s64) = G_SEXT %0
+ $x0 = COPY %1(s64)
+...
+
+# FIXME: s2 not correctly handled
