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[ARM] preserve test intent by removing undef 

We need to clean up the DAG floating-point undef logic.
This process is similar to how we handled integer undef
logic in https://reviews.llvm.org/D43141.

And as we did there, I'm trying to reduce the patch by
changing tests that would probably become meaningless
once we correct FP undef folding.

llvm-svn: 332638
This commit is contained in:
Sanjay Patel 2018-05-17 18:09:56 +00:00
parent 38892e5ce1
commit 5c48b73fff
1 changed files with 20 additions and 20 deletions
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40
llvm/test/CodeGen/ARM/2009-11-07-SubRegAsmPrinting.ll
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@ -7,47 +7,47 @@ target triple = "armv7-eabi"
define arm_aapcs_vfpcc void @foo() {
entry:
%0 = load float, float* null, align 4 ; <float> [#uses=2]
%1 = fmul float %0, undef ; <float> [#uses=2]
%1 = fmul float %0, %0 ; <float> [#uses=2]
%2 = fmul float 0.000000e+00, %1 ; <float> [#uses=2]
%3 = fmul float %0, %1 ; <float> [#uses=1]
%4 = fadd float 0.000000e+00, %3 ; <float> [#uses=1]
%5 = fsub float 1.000000e+00, %4 ; <float> [#uses=1]
; CHECK-LABEL: foo:
; CHECK: vmov.f32 s{{[0-9]+}}, #1.000000e+00
%6 = fsub float 1.000000e+00, undef ; <float> [#uses=2]
%7 = fsub float %2, undef ; <float> [#uses=1]
%8 = fsub float 0.000000e+00, undef ; <float> [#uses=3]
%9 = fadd float %2, undef ; <float> [#uses=3]
%6 = fsub float 1.000000e+00, %2 ; <float> [#uses=2]
%7 = fsub float %2, %2 ; <float> [#uses=1]
%8 = fsub float 0.000000e+00, %7 ; <float> [#uses=3]
%9 = fadd float %2, %2 ; <float> [#uses=3]
%10 = load float, float* undef, align 8 ; <float> [#uses=3]
%11 = fmul float %8, %10 ; <float> [#uses=1]
%12 = fadd float undef, %11 ; <float> [#uses=2]
%13 = fmul float undef, undef ; <float> [#uses=1]
%12 = fadd float %11, %11 ; <float> [#uses=2]
%13 = fmul float %12, %12 ; <float> [#uses=1]
%14 = fmul float %6, 0.000000e+00 ; <float> [#uses=1]
%15 = fadd float %13, %14 ; <float> [#uses=1]
%16 = fmul float %9, %10 ; <float> [#uses=1]
%17 = fadd float %15, %16 ; <float> [#uses=2]
%18 = fmul float 0.000000e+00, undef ; <float> [#uses=1]
%18 = fmul float 0.000000e+00, %17 ; <float> [#uses=1]
%19 = fadd float %18, 0.000000e+00 ; <float> [#uses=1]
%20 = fmul float undef, %10 ; <float> [#uses=1]
%20 = fmul float %10, %10 ; <float> [#uses=1]
%21 = fadd float %19, %20 ; <float> [#uses=1]
%22 = load float, float* undef, align 8 ; <float> [#uses=1]
%23 = fmul float %5, %22 ; <float> [#uses=1]
%24 = fadd float %23, undef ; <float> [#uses=1]
%24 = fadd float %23, %23 ; <float> [#uses=1]
%25 = load float, float* undef, align 8 ; <float> [#uses=2]
%26 = fmul float %8, %25 ; <float> [#uses=1]
%27 = fadd float %24, %26 ; <float> [#uses=1]
%28 = fmul float %9, %25 ; <float> [#uses=1]
%29 = fadd float undef, %28 ; <float> [#uses=1]
%29 = fadd float %28, %28 ; <float> [#uses=1]
%30 = fmul float %8, undef ; <float> [#uses=1]
%31 = fadd float undef, %30 ; <float> [#uses=1]
%32 = fmul float %6, undef ; <float> [#uses=1]
%33 = fadd float undef, %32 ; <float> [#uses=1]
%34 = fmul float %9, undef ; <float> [#uses=1]
%31 = fadd float %30, %30 ; <float> [#uses=1]
%32 = fmul float %6, %6 ; <float> [#uses=1]
%33 = fadd float %32, %32 ; <float> [#uses=1]
%34 = fmul float %9, %9 ; <float> [#uses=1]
%35 = fadd float %33, %34 ; <float> [#uses=1]
%36 = fmul float 0.000000e+00, undef ; <float> [#uses=1]
%37 = fmul float %7, undef ; <float> [#uses=1]
%37 = fmul float %7, %7 ; <float> [#uses=1]
%38 = fadd float %36, %37 ; <float> [#uses=1]
%39 = fmul float undef, undef ; <float> [#uses=1]
%39 = fmul float %38, %38 ; <float> [#uses=1]
%40 = fadd float %38, %39 ; <float> [#uses=1]
store float %12, float* undef, align 8
store float %17, float* undef, align 4
@ -57,9 +57,9 @@ entry:
store float %31, float* undef, align 8
store float %40, float* undef, align 8
store float %12, float* null, align 8
%41 = fmul float %17, undef ; <float> [#uses=1]
%42 = fadd float %41, undef ; <float> [#uses=1]
%43 = fmul float %35, undef ; <float> [#uses=1]
%41 = fmul float %17, %17 ; <float> [#uses=1]
%42 = fadd float %41, %41 ; <float> [#uses=1]
%43 = fmul float %35, %35 ; <float> [#uses=1]
%44 = fadd float %42, %43 ; <float> [#uses=1]
store float %44, float* null, align 4
unreachable