2013-05-06 18:45:16 +00:00
|
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
|
|
|
|
|
define float @test1(float %A, float %B, i1 %C) {
|
2013-07-17 20:06:03 +00:00
|
|
|
EntryBlock:
|
|
|
|
|
;; A*(1 - uitofp i1 C) -> select C, 0, A
|
|
|
|
|
%cf = uitofp i1 %C to float
|
|
|
|
|
%mc = fsub float 1.000000e+00, %cf
|
|
|
|
|
%p1 = fmul fast float %A, %mc
|
|
|
|
|
ret float %p1
|
|
|
|
|
; CHECK-LABEL: @test1(
|
|
|
|
|
; CHECK: select i1 %C, float -0.000000e+00, float %A
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
define float @test2(float %A, float %B, i1 %C) {
|
|
|
|
|
EntryBlock:
|
|
|
|
|
;; B*(uitofp i1 C) -> select C, B, 0
|
|
|
|
|
%cf = uitofp i1 %C to float
|
|
|
|
|
%p2 = fmul fast float %B, %cf
|
|
|
|
|
ret float %p2
|
|
|
|
|
; CHECK-LABEL: @test2(
|
|
|
|
|
; CHECK: select i1 %C, float %B, float -0.000000e+00
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
define float @test3(float %A, float %B, i1 %C) {
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
EntryBlock:
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
;; select C, 0, B + select C, A, 0 -> select C, A, B
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
%cf = uitofp i1 %C to float
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
%s1 = select i1 %C, float 0.000000e+00, float %B
|
|
|
|
|
%s2 = select i1 %C, float %A, float 0.000000e+00
|
|
|
|
|
%sum = fadd fast float %s1, %s2
|
|
|
|
|
ret float %sum
|
2013-07-17 20:06:03 +00:00
|
|
|
; CHECK-LABEL: @test3(
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
; CHECK: select i1 %C, float %A, float %B
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
}
|
|
|
|
|
|
2013-07-17 20:06:03 +00:00
|
|
|
define float @test4(float %A, float %B, i1 %C) {
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
EntryBlock:
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
;; B*(uitofp i1 C) + A*(1 - uitofp i1 C) -> select C, A, B
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
%cf = uitofp i1 %C to float
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
%mc = fsub fast float 1.000000e+00, %cf
|
|
|
|
|
%p1 = fmul fast float %A, %mc
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
%p2 = fmul fast float %B, %cf
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
%s1 = fadd fast float %p2, %p1
|
|
|
|
|
ret float %s1
|
2013-07-17 20:06:03 +00:00
|
|
|
; CHECK-LABEL: @test4(
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
; CHECK: select i1 %C, float %B, float %A
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
}
|
|
|
|
|
|
2013-07-17 20:06:03 +00:00
|
|
|
define float @test5(float %A, float %B, i1 %C) {
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
EntryBlock:
|
|
|
|
|
;; A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
|
|
|
|
|
%cf = uitofp i1 %C to float
|
This is an update to a previous commit (r181216).
The earlier change list introduced the following inst combines:
B * (uitofp i1 C) —> select C, B, 0
A * (1 - uitofp i1 C) —> select C, 0, A
select C, 0, B + select C, A, 0 —> select C, A, B
Together these 3 changes would simplify :
A * (1 - uitofp i1 C) + B * uitofp i1 C
down to :
select C, B, A
In practice we found that the first two substitutions can have a
negative effect on performance, because they reduce opportunities to
use FMA contractions; between the two options FMAs are often the
better choice. This change list amends the previous one to enable
just these inst combines:
select C, B, 0 + select C, 0, A —> select C, B, A
A * (1 - uitofp i1 C) + B * uitofp i1 C —> select C, B, A
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182499 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-22 18:29:31 +00:00
|
|
|
%mc = fsub fast float 1.000000e+00, %cf
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
%p1 = fmul fast float %A, %mc
|
|
|
|
|
%p2 = fmul fast float %B, %cf
|
|
|
|
|
%s1 = fadd fast float %p1, %p2
|
|
|
|
|
ret float %s1
|
2013-07-17 20:06:03 +00:00
|
|
|
; CHECK-LABEL: @test5(
|
2013-05-06 18:45:16 +00:00
|
|
|
; CHECK: select i1 %C, float %B, float %A
|
Provide InstCombines for the following 3 cases:
A * (1 - (uitofp i1 C)) -> select C, 0, A
B * (uitofp i1 C) -> select C, B, 0
select C, 0, A + select C, B, 0 -> select C, B, A
These come up in code that has been hand-optimized from a select to a linear blend,
on platforms where that may have mattered. We want to undo such changes
with the following transform:
A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181216 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:55:50 +00:00
|
|
|
}
|
|
|
|
|
|
2013-07-17 20:06:03 +00:00
|
|
|
; PR15952
|
|
|
|
|
define float @test6(float %A, float %B, i32 %C) {
|
|
|
|
|
%cf = uitofp i32 %C to float
|
|
|
|
|
%mc = fsub float 1.000000e+00, %cf
|
|
|
|
|
%p1 = fmul fast float %A, %mc
|
|
|
|
|
ret float %p1
|
|
|
|
|
; CHECK-LABEL: @test6(
|
|
|
|
|
; CHECK: uitofp
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
define float @test7(float %A, float %B, i32 %C) {
|
|
|
|
|
%cf = uitofp i32 %C to float
|
|
|
|
|
%p2 = fmul fast float %B, %cf
|
|
|
|
|
ret float %p2
|
|
|
|
|
; CHECK-LABEL: @test7(
|
|
|
|
|
; CHECK: uitofp
|
|
|
|
|
}
|
|
|
|
|
|
2014-01-19 13:36:27 +00:00
|
|
|
define <4 x float> @test8(<4 x float> %A, <4 x float> %B, <4 x i1> %C) {
|
|
|
|
|
;; B*(uitofp i1 C) + A*(1 - uitofp i1 C) -> select C, A, B
|
|
|
|
|
%cf = uitofp <4 x i1> %C to <4 x float>
|
|
|
|
|
%mc = fsub fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %cf
|
|
|
|
|
%p1 = fmul fast <4 x float> %A, %mc
|
|
|
|
|
%p2 = fmul fast <4 x float> %B, %cf
|
|
|
|
|
%s1 = fadd fast <4 x float> %p2, %p1
|
|
|
|
|
ret <4 x float> %s1
|
|
|
|
|
; CHECK-LABEL: @test8(
|
|
|
|
|
; CHECK: select <4 x i1> %C, <4 x float> %B, <4 x float> %A
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
define <4 x float> @test9(<4 x float> %A, <4 x float> %B, <4 x i1> %C) {
|
|
|
|
|
;; A*(1 - uitofp i1 C) + B*(uitofp i1 C) -> select C, A, B
|
|
|
|
|
%cf = uitofp <4 x i1> %C to <4 x float>
|
|
|
|
|
%mc = fsub fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %cf
|
|
|
|
|
%p1 = fmul fast <4 x float> %A, %mc
|
|
|
|
|
%p2 = fmul fast <4 x float> %B, %cf
|
|
|
|
|
%s1 = fadd fast <4 x float> %p1, %p2
|
|
|
|
|
ret <4 x float> %s1
|
|
|
|
|
; CHECK-LABEL: @test9
|
|
|
|
|
; CHECK: select <4 x i1> %C, <4 x float> %B, <4 x float> %A
|
|
|
|
|
}
|
