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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: [[T3:%.*]] = bitcast <2 x i64> %a to <4 x i32>
; CHECK-NEXT: [[T4:%.*]] = bitcast <2 x i64> %b to <4 x i32>
; CHECK-NEXT: [[T5:%.*]] = select <4 x i1> [[T2]], <4 x i32> [[T3]], <4 x i32> [[T4]]
; 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: [[T3:%.*]] = bitcast <2 x i64> %a to <4 x i32>
; CHECK-NEXT: [[T4:%.*]] = bitcast <2 x i64> %b to <4 x i32>
; CHECK-NEXT: [[T5:%.*]] = select <4 x i1> [[T2]], <4 x i32> [[T3]], <4 x i32> [[T4]]
; 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: [[T3:%.*]] = bitcast <2 x i64> %a to <4 x float>
; CHECK-NEXT: [[T4:%.*]] = bitcast <2 x i64> %b to <4 x float>
; CHECK-NEXT: [[T5:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T3]], <4 x float> [[T4]]
; 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
}
|
