[llvm] r214180 - [mips] Don't use odd-numbered single precision registers for fastcc calling
Sasa Stankovic
Sasa.Stankovic at imgtec.com
Tue Jul 29 07:39:25 PDT 2014
Author: sstankovic
Date: Tue Jul 29 09:39:24 2014
New Revision: 214180
URL: http://llvm.org/viewvc/llvm-project?rev=214180&view=rev
Log:
[mips] Don't use odd-numbered single precision registers for fastcc calling
convention if -mno-odd-spreg is used.
Differential Revision: http://reviews.llvm.org/D4682
Modified:
llvm/trunk/lib/Target/Mips/MipsCallingConv.td
llvm/trunk/lib/Target/Mips/MipsSubtarget.h
llvm/trunk/test/CodeGen/Mips/fastcc.ll
Modified: llvm/trunk/lib/Target/Mips/MipsCallingConv.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsCallingConv.td?rev=214180&r1=214179&r2=214180&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsCallingConv.td (original)
+++ llvm/trunk/lib/Target/Mips/MipsCallingConv.td Tue Jul 29 09:39:24 2014
@@ -203,8 +203,13 @@ def CC_Mips_FastCC : CallingConv<[
CCAssignToReg<[A0, A1, A2, A3, T0, T1, T2, T3, T4, T5, V1]>>>,
// f32 arguments are passed in single-precision floating pointer registers.
- CCIfType<[f32], CCAssignToReg<[F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10,
- F11, F12, F13, F14, F15, F16, F17, F18, F19]>>,
+ CCIfType<[f32], CCIfSubtarget<"useOddSPReg()",
+ CCAssignToReg<[F0, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13,
+ F14, F15, F16, F17, F18, F19]>>>,
+
+ // Don't use odd numbered single-precision registers for -mno-odd-spreg.
+ CCIfType<[f32], CCIfSubtarget<"noOddSPReg()",
+ CCAssignToReg<[F0, F2, F4, F6, F8, F10, F12, F14, F16, F18]>>>,
// Stack parameter slots for i32 and f32 are 32-bit words and 4-byte aligned.
CCIfType<[i32, f32], CCAssignToStack<4, 4>>,
Modified: llvm/trunk/lib/Target/Mips/MipsSubtarget.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsSubtarget.h?rev=214180&r1=214179&r2=214180&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsSubtarget.h (original)
+++ llvm/trunk/lib/Target/Mips/MipsSubtarget.h Tue Jul 29 09:39:24 2014
@@ -203,6 +203,7 @@ public:
bool isFPXX() const { return IsFPXX; }
bool isFP64bit() const { return IsFP64bit; }
bool useOddSPReg() const { return UseOddSPReg; }
+ bool noOddSPReg() const { return !UseOddSPReg; }
bool isNaN2008() const { return IsNaN2008bit; }
bool isNotFP64bit() const { return !IsFP64bit; }
bool isGP64bit() const { return IsGP64bit; }
Modified: llvm/trunk/test/CodeGen/Mips/fastcc.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/fastcc.ll?rev=214180&r1=214179&r2=214180&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/fastcc.ll (original)
+++ llvm/trunk/test/CodeGen/Mips/fastcc.ll Tue Jul 29 09:39:24 2014
@@ -1,6 +1,7 @@
; RUN: llc < %s -march=mipsel | FileCheck %s
; RUN: llc < %s -mtriple=mipsel-none-nacl-gnu \
; RUN: | FileCheck %s -check-prefix=CHECK-NACL
+; RUN: llc < %s -march=mipsel -mcpu=mips32 -mattr=+nooddspreg | FileCheck %s -check-prefix=NOODDSPREG
@gi0 = external global i32
@@ -80,6 +81,8 @@
@g15 = external global i32
@g16 = external global i32
+ at fa = common global [11 x float] zeroinitializer, align 4
+
define void @caller0() nounwind {
entry:
; CHECK: caller0
@@ -264,3 +267,84 @@ entry:
ret void
}
+define void @caller2() {
+entry:
+
+; NOODDSPREG-LABEL: caller2
+
+; Check that first 10 arguments are passed in even float registers
+; f0, f2, ... , f18. Check that 11th argument is passed on stack.
+
+; NOODDSPREG-DAG: lw $[[R0:[0-9]+]], %got(fa)(${{[0-9]+|gp}})
+; NOODDSPREG-DAG: lwc1 $f0, 0($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f2, 4($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f4, 8($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f6, 12($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f8, 16($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f10, 20($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f12, 24($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f14, 28($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f16, 32($[[R0]])
+; NOODDSPREG-DAG: lwc1 $f18, 36($[[R0]])
+
+; NOODDSPREG-DAG: lwc1 $[[F0:f[0-9]*[02468]]], 40($[[R0]])
+; NOODDSPREG-DAG: swc1 $[[F0]], 0($sp)
+
+ %0 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 0), align 4
+ %1 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 1), align 4
+ %2 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 2), align 4
+ %3 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 3), align 4
+ %4 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 4), align 4
+ %5 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 5), align 4
+ %6 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 6), align 4
+ %7 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 7), align 4
+ %8 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 8), align 4
+ %9 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 9), align 4
+ %10 = load float* getelementptr ([11 x float]* @fa, i32 0, i32 10), align 4
+ tail call fastcc void @callee2(float %0, float %1, float %2, float %3,
+ float %4, float %5, float %6, float %7,
+ float %8, float %9, float %10)
+ ret void
+}
+
+define fastcc void @callee2(float %a0, float %a1, float %a2, float %a3,
+ float %a4, float %a5, float %a6, float %a7,
+ float %a8, float %a9, float %a10) {
+entry:
+
+; NOODDSPREG-LABEL: callee2
+
+; NOODDSPREG: addiu $sp, $sp, -[[OFFSET:[0-9]+]]
+
+; Check that first 10 arguments are received in even float registers
+; f0, f2, ... , f18. Check that 11th argument is received on stack.
+
+; NOODDSPREG-DAG: lw $[[R0:[0-9]+]], %got(fa)(${{[0-9]+|gp}})
+; NOODDSPREG-DAG: swc1 $f0, 0($[[R0]])
+; NOODDSPREG-DAG: swc1 $f2, 4($[[R0]])
+; NOODDSPREG-DAG: swc1 $f4, 8($[[R0]])
+; NOODDSPREG-DAG: swc1 $f6, 12($[[R0]])
+; NOODDSPREG-DAG: swc1 $f8, 16($[[R0]])
+; NOODDSPREG-DAG: swc1 $f10, 20($[[R0]])
+; NOODDSPREG-DAG: swc1 $f12, 24($[[R0]])
+; NOODDSPREG-DAG: swc1 $f14, 28($[[R0]])
+; NOODDSPREG-DAG: swc1 $f16, 32($[[R0]])
+; NOODDSPREG-DAG: swc1 $f18, 36($[[R0]])
+
+; NOODDSPREG-DAG: lwc1 $[[F0:f[0-9]*[02468]]], [[OFFSET]]($sp)
+; NOODDSPREG-DAG: swc1 $[[F0]], 40($[[R0]])
+
+ store float %a0, float* getelementptr ([11 x float]* @fa, i32 0, i32 0), align 4
+ store float %a1, float* getelementptr ([11 x float]* @fa, i32 0, i32 1), align 4
+ store float %a2, float* getelementptr ([11 x float]* @fa, i32 0, i32 2), align 4
+ store float %a3, float* getelementptr ([11 x float]* @fa, i32 0, i32 3), align 4
+ store float %a4, float* getelementptr ([11 x float]* @fa, i32 0, i32 4), align 4
+ store float %a5, float* getelementptr ([11 x float]* @fa, i32 0, i32 5), align 4
+ store float %a6, float* getelementptr ([11 x float]* @fa, i32 0, i32 6), align 4
+ store float %a7, float* getelementptr ([11 x float]* @fa, i32 0, i32 7), align 4
+ store float %a8, float* getelementptr ([11 x float]* @fa, i32 0, i32 8), align 4
+ store float %a9, float* getelementptr ([11 x float]* @fa, i32 0, i32 9), align 4
+ store float %a10, float* getelementptr ([11 x float]* @fa, i32 0, i32 10), align 4
+ ret void
+}
+
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