1; RUN: llc < %s -O3 -relocation-model=pic -mattr=+thumb2 -mcpu=cortex-a8 -disable-branch-fold | FileCheck %s 2target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32" 3target triple = "thumbv7-apple-darwin10" 4 5; This is a case where the coalescer was too eager. These two copies were 6; considered equivalent and coalescable: 7; 8; 140 %reg1038:dsub_0<def> = VMOVD %reg1047:dsub_0, pred:14, pred:%reg0 9; 148 %reg1038:dsub_1<def> = VMOVD %reg1047:dsub_0, pred:14, pred:%reg0 10; 11; Only one can be coalesced. 12 13@.str = private constant [7 x i8] c"%g %g\0A\00", align 4 ; <[7 x i8]*> [#uses=1] 14 15define i32 @main(i32 %argc, i8** nocapture %Argv) nounwind { 16entry: 17 %0 = icmp eq i32 %argc, 2123 ; <i1> [#uses=1] 18 %U.0 = select i1 %0, double 3.282190e+01, double 8.731834e+02 ; <double> [#uses=2] 19 %1 = icmp eq i32 %argc, 5123 ; <i1> [#uses=1] 20 %V.0.ph = select i1 %1, double 7.779980e+01, double 0x409CCB9C779A6B51 ; <double> [#uses=1] 21 %2 = insertelement <2 x double> undef, double %U.0, i32 0 ; <<2 x double>> [#uses=2] 22 %3 = insertelement <2 x double> %2, double %U.0, i32 1 ; <<2 x double>> [#uses=2] 23 %4 = insertelement <2 x double> %2, double %V.0.ph, i32 1 ; <<2 x double>> [#uses=2] 24; Constant pool load followed by add. 25; Then clobber the loaded register, not the sum. 26; CHECK: vldr [[LDR:d.*]], 27; CHECK: LPC0_0: 28; CHECK: vadd.f64 [[ADD:d.*]], [[LDR]], [[LDR]] 29; CHECK-NOT: vmov.f64 [[ADD]] 30 %5 = fadd <2 x double> %3, %3 ; <<2 x double>> [#uses=2] 31 %6 = fadd <2 x double> %4, %4 ; <<2 x double>> [#uses=2] 32 %tmp7 = extractelement <2 x double> %5, i32 0 ; <double> [#uses=1] 33 %tmp5 = extractelement <2 x double> %5, i32 1 ; <double> [#uses=1] 34; CHECK: printf 35 %7 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i32 0, i32 0), double %tmp7, double %tmp5) nounwind ; <i32> [#uses=0] 36 %tmp3 = extractelement <2 x double> %6, i32 0 ; <double> [#uses=1] 37 %tmp1 = extractelement <2 x double> %6, i32 1 ; <double> [#uses=1] 38 %8 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i32 0, i32 0), double %tmp3, double %tmp1) nounwind ; <i32> [#uses=0] 39 ret i32 0 40} 41 42declare i32 @printf(i8* nocapture, ...) nounwind 43