From b74c865841481074539bdf4de35024939854f2e6 Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@apple.com>
Date: Fri, 2 Dec 2011 20:25:18 +0000
Subject: [PATCH] [arm-fast-isel] After promoting a function parameter be sure
 to update the argument value type.  Otherwise, the sign/zero-extend has no
 effect on arguments passed via the stack (i.e., undefined high-order bits).
 rdar://10515467

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145701 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMFastISel.cpp     |  6 ++--
 test/CodeGen/ARM/fast-isel-call.ll | 46 ++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 42fd8a6ab91..086eeb9ebcb 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -1765,21 +1765,23 @@ bool ARMFastISel::ProcessCallArgs(SmallVectorImpl<Value*> &Args,
     switch (VA.getLocInfo()) {
       case CCValAssign::Full: break;
       case CCValAssign::SExt: {
-        EVT DestVT = VA.getLocVT();
+        MVT DestVT = VA.getLocVT();
         unsigned ResultReg = ARMEmitIntExt(ArgVT, Arg, DestVT,
                                            /*isZExt*/false);
         assert (ResultReg != 0 && "Failed to emit a sext");
         Arg = ResultReg;
+        ArgVT = DestVT;
         break;
       }
       case CCValAssign::AExt:
         // Intentional fall-through.  Handle AExt and ZExt.
       case CCValAssign::ZExt: {
-        EVT DestVT = VA.getLocVT();
+        MVT DestVT = VA.getLocVT();
         unsigned ResultReg = ARMEmitIntExt(ArgVT, Arg, DestVT,
                                            /*isZExt*/true);
         assert (ResultReg != 0 && "Failed to emit a sext");
         Arg = ResultReg;
+        ArgVT = DestVT;
         break;
       }
       case CCValAssign::BCvt: {
diff --git a/test/CodeGen/ARM/fast-isel-call.ll b/test/CodeGen/ARM/fast-isel-call.ll
index 00346bf404c..695dbba6ccc 100644
--- a/test/CodeGen/ARM/fast-isel-call.ll
+++ b/test/CodeGen/ARM/fast-isel-call.ll
@@ -80,3 +80,49 @@ declare zeroext i16 @t6();
 declare signext i8 @t7();
 declare zeroext i8 @t8();
 declare zeroext i1 @t9();
+
+define i32 @t10(i32 %argc, i8** nocapture %argv) {
+entry:
+; ARM: @t10
+; ARM: movw r0, #0
+; ARM: movw r1, #248
+; ARM: movw r2, #187
+; ARM: movw r3, #28
+; ARM: movw r9, #40
+; ARM: movw r12, #186
+; ARM: uxtb r0, r0
+; ARM: uxtb r1, r1
+; ARM: uxtb r2, r2
+; ARM: uxtb r3, r3
+; ARM: uxtb r9, r9
+; ARM: str r9, [sp]
+; ARM: uxtb r9, r12
+; ARM: str r9, [sp, #4]
+; ARM: bl _bar
+; THUMB: @t10
+; THUMB: movs r0, #0
+; THUMB: movt r0, #0
+; THUMB: movs r1, #248
+; THUMB: movt r1, #0
+; THUMB: movs r2, #187
+; THUMB: movt r2, #0
+; THUMB: movs r3, #28
+; THUMB: movt r3, #0
+; THUMB: movw r9, #40
+; THUMB: movt r9, #0
+; THUMB: movw r12, #186
+; THUMB: movt r12, #0
+; THUMB: uxtb r0, r0
+; THUMB: uxtb r1, r1
+; THUMB: uxtb r2, r2
+; THUMB: uxtb r3, r3
+; THUMB: uxtb.w r9, r9
+; THUMB: str.w r9, [sp]
+; THUMB: uxtb.w r9, r12
+; THUMB: str.w r9, [sp, #4]
+; THUMB: bl _bar
+  %call = call i32 @bar(i8 zeroext 0, i8 zeroext -8, i8 zeroext -69, i8 zeroext 28, i8 zeroext 40, i8 zeroext -70)
+  ret i32 0
+}
+
+declare i32 @bar(i8 zeroext, i8 zeroext, i8 zeroext, i8 zeroext, i8 zeroext, i8 zeroext)