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[InstCombine] Fix the outofrange tests and add exact shift tests for D88429

This commit is contained in:
Simon Pilgrim 2020-09-29 17:15:00 +01:00
parent b610d73b3f
commit e5f047f27e
1 changed files with 22 additions and 9 deletions
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31
llvm/test/Transforms/InstCombine/trunc-shift-trunc.ll
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@ -62,12 +62,12 @@ define <2 x i8> @trunc_lshr_trunc_uniform_undef(<2 x i64> %a) {
define i8 @trunc_lshr_trunc_outofrange(i64 %a) {
; CHECK-LABEL: @trunc_lshr_trunc_outofrange(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[C:%.*]] = lshr i32 [[B]], 9
; CHECK-NEXT: [[C:%.*]] = lshr i32 [[B]], 25
; CHECK-NEXT: [[D:%.*]] = trunc i32 [[C]] to i8
; CHECK-NEXT: ret i8 [[D]]
;
%b = trunc i64 %a to i32
%c = lshr i32 %b, 9
%c = lshr i32 %b, 25
%d = trunc i32 %c to i8
ret i8 %d
}
@ -75,12 +75,12 @@ define i8 @trunc_lshr_trunc_outofrange(i64 %a) {
define <2 x i8> @trunc_lshr_trunc_nonuniform_outofrange(<2 x i64> %a) {
; CHECK-LABEL: @trunc_lshr_trunc_nonuniform_outofrange(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[C:%.*]] = lshr <2 x i32> [[B]], <i32 8, i32 11>
; CHECK-NEXT: [[C:%.*]] = lshr <2 x i32> [[B]], <i32 8, i32 25>
; CHECK-NEXT: [[D:%.*]] = trunc <2 x i32> [[C]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = lshr <2 x i32> %b, <i32 8, i32 11>
%c = lshr <2 x i32> %b, <i32 8, i32 25>
%d = trunc <2 x i32> %c to <2 x i8>
ret <2 x i8> %d
}
@ -98,6 +98,19 @@ define i8 @trunc_ashr_trunc(i64 %a) {
ret i8 %d
}
define i8 @trunc_ashr_trunc_exact(i64 %a) {
; CHECK-LABEL: @trunc_ashr_trunc_exact(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[TMP1:%.*]] = lshr exact i32 [[B]], 8
; CHECK-NEXT: [[D:%.*]] = trunc i32 [[TMP1]] to i8
; CHECK-NEXT: ret i8 [[D]]
;
%b = trunc i64 %a to i32
%c = ashr exact i32 %b, 8
%d = trunc i32 %c to i8
ret i8 %d
}
define <2 x i8> @trunc_ashr_trunc_uniform(<2 x i64> %a) {
; CHECK-LABEL: @trunc_ashr_trunc_uniform(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
@ -140,12 +153,12 @@ define <2 x i8> @trunc_ashr_trunc_uniform_undef(<2 x i64> %a) {
define i8 @trunc_ashr_trunc_outofrange(i64 %a) {
; CHECK-LABEL: @trunc_ashr_trunc_outofrange(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[B]], 9
; CHECK-NEXT: [[D:%.*]] = trunc i32 [[TMP1]] to i8
; CHECK-NEXT: [[C:%.*]] = ashr i32 [[B]], 25
; CHECK-NEXT: [[D:%.*]] = trunc i32 [[C]] to i8
; CHECK-NEXT: ret i8 [[D]]
;
%b = trunc i64 %a to i32
%c = ashr i32 %b, 9
%c = ashr i32 %b, 25
%d = trunc i32 %c to i8
ret i8 %d
}
@ -153,12 +166,12 @@ define i8 @trunc_ashr_trunc_outofrange(i64 %a) {
define <2 x i8> @trunc_ashr_trunc_nonuniform_outofrange(<2 x i64> %a) {
; CHECK-LABEL: @trunc_ashr_trunc_nonuniform_outofrange(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[C:%.*]] = ashr <2 x i32> [[B]], <i32 8, i32 11>
; CHECK-NEXT: [[C:%.*]] = ashr <2 x i32> [[B]], <i32 8, i32 25>
; CHECK-NEXT: [[D:%.*]] = trunc <2 x i32> [[C]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = ashr <2 x i32> %b, <i32 8, i32 11>
%c = ashr <2 x i32> %b, <i32 8, i32 25>
%d = trunc <2 x i32> %c to <2 x i8>
ret <2 x i8> %d
}