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llvm-mirror/test/Transforms/InstCombine/minmax-fold.ll
Sanjay Patel 3ff9c85b95 [InstCombine] move icmp transforms that might be recognized as min/max and inf-loop (PR31751) 
This is a minimal patch to avoid the infinite loop in:
https://llvm.org/bugs/show_bug.cgi?id=31751

But the general problem is bigger: we're not canonicalizing all of the min/max forms reported
by value tracking's matchSelectPattern(), and we don't define min/max consistently. Some code
uses matchSelectPattern(), other code uses matchers like m_Umax, and others have their own
inline definitions which may be subtly different from any of the above.

The reason that the test cases in this patch need a cast op to trigger is because we don't
(yet) canonicalize all min/max forms based on matchSelectPattern() in 
canonicalizeMinMaxWithConstant(), but we do make min/max+cast transforms based on 
matchSelectPattern() in visitSelectInst().

The location of the icmp transforms that trigger the inf-loop seems arbitrary at best, so
I'm moving those behind the min/max fence in visitICmpInst() as the quick fix.

llvm-svn: 293345
2017-01-27 23:26:27 +00:00

495 lines
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
; This is the canonical form for a type-changing min/max.
define i64 @t1(i32 %a) {
; CHECK-LABEL: @t1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %a, 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 %a, i32 5
; CHECK-NEXT: [[TMP3:%.*]] = sext i32 [[TMP2]] to i64
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp slt i32 %a, 5
%2 = select i1 %1, i32 %a, i32 5
%3 = sext i32 %2 to i64
ret i64 %3
}
; Check this is converted into canonical form, as above.
define i64 @t2(i32 %a) {
; CHECK-LABEL: @t2(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %a, 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 %a, i32 5
; CHECK-NEXT: [[TMP3:%.*]] = sext i32 [[TMP2]] to i64
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp slt i32 %a, 5
%2 = sext i32 %a to i64
%3 = select i1 %1, i64 %2, i64 5
ret i64 %3
}
; Same as @t2, with flipped operands and zext instead of sext.
define i64 @t3(i32 %a) {
; CHECK-LABEL: @t3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 %a, 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 %a, i32 5
; CHECK-NEXT: [[TMP3:%.*]] = zext i32 [[TMP2]] to i64
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp ult i32 %a, 5
%2 = zext i32 %a to i64
%3 = select i1 %1, i64 5, i64 %2
ret i64 %3
}
; Same again, with trunc.
define i32 @t4(i64 %a) {
; CHECK-LABEL: @t4(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 %a, 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 %a, i64 5
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT: ret i32 [[TMP3]]
;
%1 = icmp slt i64 %a, 5
%2 = trunc i64 %a to i32
%3 = select i1 %1, i32 %2, i32 5
ret i32 %3
}
; Same as @t3, but with mismatched signedness between icmp and zext.
; InstCombine should leave this alone.
define i64 @t5(i32 %a) {
; CHECK-LABEL: @t5(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %a, 5
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 %a to i64
; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[TMP1]], i64 5, i64 [[TMP2]]
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp slt i32 %a, 5
%2 = zext i32 %a to i64
%3 = select i1 %1, i64 5, i64 %2
ret i64 %3
}
define float @t6(i32 %a) {
; CHECK-LABEL: @t6(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %a, 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 %a, i32 0
; CHECK-NEXT: [[TMP3:%.*]] = sitofp i32 [[TMP2]] to float
; CHECK-NEXT: ret float [[TMP3]]
;
%1 = icmp slt i32 %a, 0
%2 = select i1 %1, i32 %a, i32 0
%3 = sitofp i32 %2 to float
ret float %3
}
define i16 @t7(i32 %a) {
; CHECK-LABEL: @t7(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %a, -32768
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 %a, i32 -32768
; CHECK-NEXT: [[TMP3:%.*]] = trunc i32 [[TMP2]] to i16
; CHECK-NEXT: ret i16 [[TMP3]]
;
%1 = icmp slt i32 %a, -32768
%2 = trunc i32 %a to i16
%3 = select i1 %1, i16 %2, i16 -32768
ret i16 %3
}
; Just check for no infinite loop. InstSimplify liked to
; "simplify" -32767 by removing all the sign bits,
; which led to a canonicalization fight between different
; parts of instcombine.
define i32 @t8(i64 %a, i32 %b) {
; CHECK-LABEL: @t8(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 %a, -32767
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 %a, i64 -32767
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT: [[TMP4:%.*]] = icmp slt i32 %b, 42
; CHECK-NEXT: [[TMP5:%.*]] = select i1 [[TMP4]], i32 42, i32 [[TMP3]]
; CHECK-NEXT: [[TMP6:%.*]] = icmp ne i32 [[TMP5]], %b
; CHECK-NEXT: [[TMP7:%.*]] = zext i1 [[TMP6]] to i32
; CHECK-NEXT: ret i32 [[TMP7]]
;
%1 = icmp slt i64 %a, -32767
%2 = select i1 %1, i64 %a, i64 -32767
%3 = trunc i64 %2 to i32
%4 = icmp slt i32 %b, 42
%5 = select i1 %4, i32 42, i32 %3
%6 = icmp ne i32 %5, %b
%7 = zext i1 %6 to i32
ret i32 %7
}
; Ensure this doesn't get converted to a min/max.
define i64 @t9(i32 %a) {
; CHECK-LABEL: @t9(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 %a, -1
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 %a to i64
; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[TMP1]], i64 [[TMP2]], i64 4294967295
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp sgt i32 %a, -1
%2 = sext i32 %a to i64
%3 = select i1 %1, i64 %2, i64 4294967295
ret i64 %3
}
; Reuse the first 2 bitcasts as the select operands.
define <4 x i32> @bitcasts_fcmp_1(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_fcmp_1(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> %a to <4 x float>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> %b to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fcmp olt <4 x float> [[T1]], [[T0]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T0]], <4 x float> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x float> [[TMP1]] to <4 x i32>
; CHECK-NEXT: ret <4 x i32> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x float>
%t1 = bitcast <2 x i64> %b to <4 x float>
%t2 = fcmp olt <4 x float> %t1, %t0
%t3 = bitcast <2 x i64> %a to <4 x i32>
%t4 = bitcast <2 x i64> %b to <4 x i32>
%t5 = select <4 x i1> %t2, <4 x i32> %t3, <4 x i32> %t4
ret <4 x i32> %t5
}
; Switch cmp operand order.
define <4 x i32> @bitcasts_fcmp_2(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_fcmp_2(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> %a to <4 x float>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> %b to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fcmp olt <4 x float> [[T0]], [[T1]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T0]], <4 x float> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x float> [[TMP1]] to <4 x i32>
; CHECK-NEXT: ret <4 x i32> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x float>
%t1 = bitcast <2 x i64> %b to <4 x float>
%t2 = fcmp olt <4 x float> %t0, %t1
%t3 = bitcast <2 x i64> %a to <4 x i32>
%t4 = bitcast <2 x i64> %b to <4 x i32>
%t5 = select <4 x i1> %t2, <4 x i32> %t3, <4 x i32> %t4
ret <4 x i32> %t5
}
; Integer cmp should have the same transforms.
define <4 x float> @bitcasts_icmp(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_icmp(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> %a to <4 x i32>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> %b to <4 x i32>
; CHECK-NEXT: [[T2:%.*]] = icmp slt <4 x i32> [[T1]], [[T0]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x i32> [[T0]], <4 x i32> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x i32> [[TMP1]] to <4 x float>
; CHECK-NEXT: ret <4 x float> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x i32>
%t1 = bitcast <2 x i64> %b to <4 x i32>
%t2 = icmp slt <4 x i32> %t1, %t0
%t3 = bitcast <2 x i64> %a to <4 x float>
%t4 = bitcast <2 x i64> %b to <4 x float>
%t5 = select <4 x i1> %t2, <4 x float> %t3, <4 x float> %t4
ret <4 x float> %t5
}
; SMIN(SMIN(X, 11), 92) -> SMIN(X, 11)
define i32 @test68(i32 %x) {
; CHECK-LABEL: @test68(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %x, 11
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 %x, i32 11
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp slt i32 11, %x
%cond = select i1 %cmp, i32 11, i32 %x
%cmp3 = icmp slt i32 92, %cond
%retval = select i1 %cmp3, i32 92, i32 %cond
ret i32 %retval
}
define <2 x i32> @test68vec(<2 x i32> %x) {
; CHECK-LABEL: @test68vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> %x, <i32 11, i32 11>
; CHECK-NEXT: [[COND:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> %x, <2 x i32> <i32 11, i32 11>
; CHECK-NEXT: ret <2 x i32> [[COND]]
;
%cmp = icmp slt <2 x i32> <i32 11, i32 11>, %x
%cond = select <2 x i1> %cmp, <2 x i32> <i32 11, i32 11>, <2 x i32> %x
%cmp3 = icmp slt <2 x i32> <i32 92, i32 92>, %cond
%retval = select <2 x i1> %cmp3, <2 x i32> <i32 92, i32 92>, <2 x i32> %cond
ret <2 x i32> %retval
}
; MIN(MIN(X, 24), 83) -> MIN(X, 24)
define i32 @test69(i32 %x) {
; CHECK-LABEL: @test69(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 %x, 24
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 %x, i32 24
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 24, %x
%cond = select i1 %cmp, i32 24, i32 %x
%cmp3 = icmp ult i32 83, %cond
%retval = select i1 %cmp3, i32 83, i32 %cond
ret i32 %retval
}
; SMAX(SMAX(X, 75), 36) -> SMAX(X, 75)
define i32 @test70(i32 %x) {
; CHECK-LABEL: @test70(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 %x, 75
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 %x, i32 75
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp slt i32 %x, 75
%cond = select i1 %cmp, i32 75, i32 %x
%cmp3 = icmp slt i32 %cond, 36
%retval = select i1 %cmp3, i32 36, i32 %cond
ret i32 %retval
}
; MAX(MAX(X, 68), 47) -> MAX(X, 68)
define i32 @test71(i32 %x) {
; CHECK-LABEL: @test71(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 %x, 68
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 %x, i32 68
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 %x, 68
%cond = select i1 %cmp, i32 68, i32 %x
%cmp3 = icmp ult i32 %cond, 47
%retval = select i1 %cmp3, i32 47, i32 %cond
ret i32 %retval
}
; SMIN(SMIN(X, 92), 11) -> SMIN(X, 11)
define i32 @test72(i32 %x) {
; CHECK-LABEL: @test72(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 %x, 11
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 %x, i32 11
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp sgt i32 %x, 92
%cond = select i1 %cmp, i32 92, i32 %x
%cmp3 = icmp sgt i32 %cond, 11
%retval = select i1 %cmp3, i32 11, i32 %cond
ret i32 %retval
}
; FIXME - vector neglect: FoldAndOfICmps() / FoldOrOfICmps()
define <2 x i32> @test72vec(<2 x i32> %x) {
; CHECK-LABEL: @test72vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> %x, <i32 92, i32 92>
; CHECK-NEXT: [[TMP2:%.*]] = icmp slt <2 x i32> %x, <i32 11, i32 11>
; CHECK-NEXT: [[TMP3:%.*]] = and <2 x i1> [[TMP1]], [[TMP2]]
; CHECK-NEXT: [[RETVAL:%.*]] = select <2 x i1> [[TMP3]], <2 x i32> %x, <2 x i32> <i32 11, i32 11>
; CHECK-NEXT: ret <2 x i32> [[RETVAL]]
;
%cmp = icmp sgt <2 x i32> %x, <i32 92, i32 92>
%cond = select <2 x i1> %cmp, <2 x i32> <i32 92, i32 92>, <2 x i32> %x
%cmp3 = icmp sgt <2 x i32> %cond, <i32 11, i32 11>
%retval = select <2 x i1> %cmp3, <2 x i32> <i32 11, i32 11>, <2 x i32> %cond
ret <2 x i32> %retval
}
; MIN(MIN(X, 83), 24) -> MIN(X, 24)
define i32 @test73(i32 %x) {
; CHECK-LABEL: @test73(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 %x, 24
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 %x, i32 24
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp ugt i32 %x, 83
%cond = select i1 %cmp, i32 83, i32 %x
%cmp3 = icmp ugt i32 %cond, 24
%retval = select i1 %cmp3, i32 24, i32 %cond
ret i32 %retval
}
; SMAX(SMAX(X, 36), 75) -> SMAX(X, 75)
define i32 @test74(i32 %x) {
; CHECK-LABEL: @test74(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 %x, 75
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 %x, i32 75
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp slt i32 %x, 36
%cond = select i1 %cmp, i32 36, i32 %x
%cmp3 = icmp slt i32 %cond, 75
%retval = select i1 %cmp3, i32 75, i32 %cond
ret i32 %retval
}
; MAX(MAX(X, 47), 68) -> MAX(X, 68)
define i32 @test75(i32 %x) {
; CHECK-LABEL: @test75(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 %x, 68
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 %x, i32 68
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp ult i32 %x, 47
%cond = select i1 %cmp, i32 47, i32 %x
%cmp3 = icmp ult i32 %cond, 68
%retval = select i1 %cmp3, i32 68, i32 %cond
ret i32 %retval
}
; The next 4 tests are value clamping with constants:
; https://llvm.org/bugs/show_bug.cgi?id=31693
; (X <s C1) ? C1 : SMIN(X, C2) ==> SMAX(SMIN(X, C2), C1)
define i32 @clamp_signed1(i32 %x) {
; CHECK-LABEL: @clamp_signed1(
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 %x, 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 %x, i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp slt i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp slt i32 %x, 15
%r = select i1 %cmp1, i32 15, i32 %min
ret i32 %r
}
; (X >s C1) ? C1 : SMAX(X, C2) ==> SMIN(SMAX(X, C2), C1)
define i32 @clamp_signed2(i32 %x) {
; CHECK-LABEL: @clamp_signed2(
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i32 %x, 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 %x, i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp sgt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp sgt i32 %x, 255
%r = select i1 %cmp1, i32 255, i32 %max
ret i32 %r
}
; (X <u C1) ? C1 : UMIN(X, C2) ==> UMAX(UMIN(X, C2), C1)
define i32 @clamp_unsigned1(i32 %x) {
; CHECK-LABEL: @clamp_unsigned1(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 %x, 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 %x, i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ult i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp ult i32 %x, 15
%r = select i1 %cmp1, i32 15, i32 %min
ret i32 %r
}
; (X >u C1) ? C1 : UMAX(X, C2) ==> UMIN(UMAX(X, C2), C1)
define i32 @clamp_unsigned2(i32 %x) {
; CHECK-LABEL: @clamp_unsigned2(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 %x, 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 %x, i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ugt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp ugt i32 %x, 255
%r = select i1 %cmp1, i32 255, i32 %max
ret i32 %r
}
; The next 3 min tests should canonicalize to the same form...and not infinite loop.
define double @PR31751_umin1(i32 %x) {
; CHECK-LABEL: @PR31751_umin1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 %x, 2147483647
; CHECK-NEXT: [[CONV1:%.*]] = select i1 [[TMP1]], i32 %x, i32 2147483647
; CHECK-NEXT: [[TMP2:%.*]] = sitofp i32 [[CONV1]] to double
; CHECK-NEXT: ret double [[TMP2]]
;
%cmp = icmp slt i32 %x, 0
%sel = select i1 %cmp, i32 2147483647, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umin2(i32 %x) {
; CHECK-LABEL: @PR31751_umin2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 %x, 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 %x, i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ult i32 %x, 2147483647
%sel = select i1 %cmp, i32 %x, i32 2147483647
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umin3(i32 %x) {
; CHECK-LABEL: @PR31751_umin3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 %x, 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 %x, i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ugt i32 %x, 2147483647
%sel = select i1 %cmp, i32 2147483647, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
; The next 3 max tests should canonicalize to the same form...and not infinite loop.
define double @PR31751_umax1(i32 %x) {
; CHECK-LABEL: @PR31751_umax1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 %x, -2147483648
; CHECK-NEXT: [[CONV1:%.*]] = select i1 [[TMP1]], i32 %x, i32 -2147483648
; CHECK-NEXT: [[TMP2:%.*]] = sitofp i32 [[CONV1]] to double
; CHECK-NEXT: ret double [[TMP2]]
;
%cmp = icmp sgt i32 %x, -1
%sel = select i1 %cmp, i32 2147483648, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umax2(i32 %x) {
; CHECK-LABEL: @PR31751_umax2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 %x, -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 %x, i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ugt i32 %x, 2147483648
%sel = select i1 %cmp, i32 %x, i32 2147483648
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umax3(i32 %x) {
; CHECK-LABEL: @PR31751_umax3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 %x, -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 %x, i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ult i32 %x, 2147483648
%sel = select i1 %cmp, i32 2147483648, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
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