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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174569 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Ilseman 2013-02-07 01:27:13 +00:00
parent 49db4691cf
commit 9f41a5c7fa
1 changed files with 12 additions and 12 deletions
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24
test/Transforms/InstCombine/fast-math.ll
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@ -97,10 +97,10 @@ define float @fold9(float %f1, float %f2) {
}
; Let C3 = C1 + C2. (f1 + C1) + (f2 + C2) => (f1 + f2) + C3 instead of
; "(f1 + C3) + f2" or "(f2 + C3) + f1". Placing constant-addend at the
; "(f1 + C3) + f2" or "(f2 + C3) + f1". Placing constant-addend at the
; top of resulting simplified expression tree may potentially reveal some
; optimization opportunities in the super-expression trees.
;
;
define float @fold10(float %f1, float %f2) {
%t1 = fadd fast float 2.000000e+00, %f1
%t2 = fsub fast float %f2, 3.000000e+00
@ -141,7 +141,7 @@ define float @fmul_distribute1(float %f1) {
%t1 = fmul float %f1, 6.0e+3
%t2 = fadd float %t1, 2.0e+3
%t3 = fmul fast float %t2, 5.0e+3
ret float %t3
ret float %t3
; CHECK: @fmul_distribute1
; CHECK: %1 = fmul fast float %f1, 3.000000e+07
; CHECK: %t3 = fadd fast float %1, 1.000000e+07
@ -174,9 +174,9 @@ define double @fmul_distribute3(double %f1) {
; C1/X * C2 => (C1*C2) / X
define float @fmul2(float %f1) {
%t1 = fdiv float 2.0e+3, %f1
%t1 = fdiv float 2.0e+3, %f1
%t3 = fmul fast float %t1, 6.0e+3
ret float %t3
ret float %t3
; CHECK: @fmul2
; CHECK: fdiv fast float 1.200000e+07, %f1
}
@ -185,7 +185,7 @@ define float @fmul2(float %f1) {
define float @fmul3(float %f1, float %f2) {
%t1 = fdiv float %f1, 2.0e+3
%t3 = fmul fast float %t1, 6.0e+3
ret float %t3
ret float %t3
; CHECK: @fmul3
; CHECK: fmul fast float %f1, 3.000000e+00
}
@ -196,18 +196,18 @@ define float @fmul3(float %f1, float %f2) {
define float @fmul4(float %f1, float %f2) {
%t1 = fdiv float %f1, 2.0e+3
%t3 = fmul fast float %t1, 0x3810000000000000
ret float %t3
ret float %t3
; CHECK: @fmul4
; CHECK: fmul fast float %t1, 0x3810000000000000
}
; X / C1 * C2 => X / (C2/C1) if C1/C2 is either a special value of a denormal,
; X / C1 * C2 => X / (C2/C1) if C1/C2 is either a special value of a denormal,
; and C2/C1 is a normal value.
;
;
define float @fmul5(float %f1, float %f2) {
%t1 = fdiv float %f1, 3.0e+0
%t3 = fmul fast float %t1, 0x3810000000000000
ret float %t3
ret float %t3
; CHECK: @fmul5
; CHECK: fdiv fast float %f1, 0x47E8000000000000
}
@ -218,7 +218,7 @@ define float @fmul6(float %f1, float %f2) {
%mul1 = fmul fast float %mul, %f1
ret float %mul1
; CHECK: @fmul6
; CHECK: fmul fast float %f1, %f1
; CHECK: fmul fast float %f1, %f1
}
; "(X*Y) * X => (X*X) * Y" is disabled if "X*Y" has multiple uses
@ -277,7 +277,7 @@ define float @fdiv2(float %x) {
}
; "X/C1 / C2 => X * (1/(C2*C1))" is disabled (for now) is C2/C1 is a denormal
;
;
define float @fdiv3(float %x) {
%div = fdiv float %x, 0x47EFFFFFE0000000
%div1 = fdiv fast float %div, 0x4002666660000000