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[NFC][Instcombine] More trunc fp-to-int tests.
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@sparker-arm
sparker-arm committed Jan 23, 2023
1 parent bf9e0da commit 6dc8e21
Showing 1 changed file with 159 additions and 6 deletions.
165 changes: 159 additions & 6 deletions llvm/test/Transforms/InstCombine/trunc-fp-to-int.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ define i16 @half_fptoui_i32_i16(half %x) {
}

; Wider final type is ok.
; TODO: Handle non-simple result type.

define i17 @half_fptoui_i32_i17(half %x) {
; CHECK-LABEL: @half_fptoui_i32_i17(
Expand Down Expand Up @@ -103,6 +104,21 @@ define i128 @float_fptoui_i129_i128(float %x) {
ret i128 %r
}

; TODO: We could transform with multiple users.
declare void @use(i129)
define i128 @float_fptoui_i129_i128_use(float %x) {
; CHECK-LABEL: @float_fptoui_i129_i128_use(
; CHECK-NEXT: [[I:%.*]] = fptoui float [[X:%.*]] to i129
; CHECK-NEXT: call void @use(i129 [[I]])
; CHECK-NEXT: [[R:%.*]] = trunc i129 [[I]] to i128
; CHECK-NEXT: ret i128 [[R]]
;
%i = fptoui float %x to i129
call void @use(i129 %i)
%r = trunc i129 %i to i128
ret i128 %r
}

; Negative test - not enough bits to hold max float value (2**127 * (2 − 2**−23))

define i127 @float_fptoui_i128_i127(float %x) {
Expand All @@ -116,8 +132,8 @@ define i127 @float_fptoui_i128_i127(float %x) {
ret i127 %r
}

define i1024 @float_fptoui_i1025_i1024(double %x) {
; CHECK-LABEL: @float_fptoui_i1025_i1024(
define i1024 @double_fptoui_i1025_i1024(double %x) {
; CHECK-LABEL: @double_fptoui_i1025_i1024(
; CHECK-NEXT: [[I:%.*]] = fptoui double [[X:%.*]] to i1025
; CHECK-NEXT: [[R:%.*]] = trunc i1025 [[I]] to i1024
; CHECK-NEXT: ret i1024 [[R]]
Expand All @@ -129,13 +145,150 @@ define i1024 @float_fptoui_i1025_i1024(double %x) {

; Negative test - not enough bits to hold max double value (2**1023 * (2 − 2**−52))

define i1023 @float_fptoui_i1024_i1023(float %x) {
; CHECK-LABEL: @float_fptoui_i1024_i1023(
; CHECK-NEXT: [[I:%.*]] = fptoui float [[X:%.*]] to i1024
define i1023 @double_fptoui_i1024_i1023(double %x) {
; CHECK-LABEL: @double_fptoui_i1024_i1023(
; CHECK-NEXT: [[I:%.*]] = fptoui double [[X:%.*]] to i1024
; CHECK-NEXT: [[R:%.*]] = trunc i1024 [[I]] to i1023
; CHECK-NEXT: ret i1023 [[R]]
;
%i = fptoui float %x to i1024
%i = fptoui double %x to i1024
%r = trunc i1024 %i to i1023
ret i1023 %r
}

; Negative test - not enough bits to hold min half value (-65504).

define i16 @half_fptosi_i17_i16(half %x) {
; CHECK-LABEL: @half_fptosi_i17_i16(
; CHECK-NEXT: [[I:%.*]] = fptosi half [[X:%.*]] to i17
; CHECK-NEXT: [[R:%.*]] = trunc i17 [[I]] to i16
; CHECK-NEXT: ret i16 [[R]]
;
%i = fptosi half %x to i17
%r = trunc i17 %i to i16
ret i16 %r
}

define i17 @half_fptosi_i18_i17(half %x) {
; CHECK-LABEL: @half_fptosi_i18_i17(
; CHECK-NEXT: [[I:%.*]] = fptosi half [[X:%.*]] to i18
; CHECK-NEXT: [[R:%.*]] = trunc i18 [[I]] to i17
; CHECK-NEXT: ret i17 [[R]]
;
%i = fptosi half %x to i18
%r = trunc i18 %i to i17
ret i17 %r
}

; Wider intermediate type is ok.
; TODO: Handle non-simple result type.

define i17 @half_fptosi_i32_i17(half %x) {
; CHECK-LABEL: @half_fptosi_i32_i17(
; CHECK-NEXT: [[I:%.*]] = fptosi half [[X:%.*]] to i32
; CHECK-NEXT: [[R:%.*]] = trunc i32 [[I]] to i17
; CHECK-NEXT: ret i17 [[R]]
;
%i = fptosi half %x to i32
%r = trunc i32 %i to i17
ret i17 %r
}

; Wider final type is ok.
; TODO: Handle non-simple result type.

define i18 @half_fptosi_i32_i18(half %x) {
; CHECK-LABEL: @half_fptosi_i32_i18(
; CHECK-NEXT: [[I:%.*]] = fptosi half [[X:%.*]] to i32
; CHECK-NEXT: [[R:%.*]] = trunc i32 [[I]] to i18
; CHECK-NEXT: ret i18 [[R]]
;
%i = fptosi half %x to i32
%r = trunc i32 %i to i18
ret i18 %r
}

; Vectors work too.

define <4 x i17> @half_fptosi_4xi32_4xi17(<4 x half> %x) {
; CHECK-LABEL: @half_fptosi_4xi32_4xi17(
; CHECK-NEXT: [[I:%.*]] = fptosi <4 x half> [[X:%.*]] to <4 x i32>
; CHECK-NEXT: [[R:%.*]] = trunc <4 x i32> [[I]] to <4 x i17>
; CHECK-NEXT: ret <4 x i17> [[R]]
;
%i = fptosi <4 x half> %x to <4 x i32>
%r = trunc <4 x i32> %i to <4 x i17>
ret <4 x i17> %r
}

; Negative test - not enough bits to hold min float value.

define i128 @bfloat_fptosi_i129_i128(bfloat %x) {
; CHECK-LABEL: @bfloat_fptosi_i129_i128(
; CHECK-NEXT: [[I:%.*]] = fptosi bfloat [[X:%.*]] to i129
; CHECK-NEXT: [[R:%.*]] = trunc i129 [[I]] to i128
; CHECK-NEXT: ret i128 [[R]]
;
%i = fptosi bfloat %x to i129
%r = trunc i129 %i to i128
ret i128 %r
}

define i129 @bfloat_fptosi_i130_i129(bfloat %x) {
; CHECK-LABEL: @bfloat_fptosi_i130_i129(
; CHECK-NEXT: [[I:%.*]] = fptosi bfloat [[X:%.*]] to i130
; CHECK-NEXT: [[R:%.*]] = trunc i130 [[I]] to i129
; CHECK-NEXT: ret i129 [[R]]
;
%i = fptosi bfloat %x to i130
%r = trunc i130 %i to i129
ret i129 %r
}

define i129 @float_fptosi_i130_i129(float %x) {
; CHECK-LABEL: @float_fptosi_i130_i129(
; CHECK-NEXT: [[I:%.*]] = fptosi float [[X:%.*]] to i130
; CHECK-NEXT: [[R:%.*]] = trunc i130 [[I]] to i129
; CHECK-NEXT: ret i129 [[R]]
;
%i = fptosi float %x to i130
%r = trunc i130 %i to i129
ret i129 %r
}

; Negative test - not enough bits to hold min float value.

define i128 @float_fptosi_i129_i128(float %x) {
; CHECK-LABEL: @float_fptosi_i129_i128(
; CHECK-NEXT: [[I:%.*]] = fptosi float [[X:%.*]] to i129
; CHECK-NEXT: [[R:%.*]] = trunc i129 [[I]] to i128
; CHECK-NEXT: ret i128 [[R]]
;
%i = fptosi float %x to i129
%r = trunc i129 %i to i128
ret i128 %r
}

define i1025 @double_fptosi_i1026_i1025(double %x) {
; CHECK-LABEL: @double_fptosi_i1026_i1025(
; CHECK-NEXT: [[I:%.*]] = fptosi double [[X:%.*]] to i1026
; CHECK-NEXT: [[R:%.*]] = trunc i1026 [[I]] to i1025
; CHECK-NEXT: ret i1025 [[R]]
;
%i = fptosi double %x to i1026
%r = trunc i1026 %i to i1025
ret i1025 %r
}

; Negative test - not enough bits to hold min double value.

define i1024 @double_fptosi_i1025_i1024(double %x) {
; CHECK-LABEL: @double_fptosi_i1025_i1024(
; CHECK-NEXT: [[I:%.*]] = fptosi double [[X:%.*]] to i1025
; CHECK-NEXT: [[R:%.*]] = trunc i1025 [[I]] to i1024
; CHECK-NEXT: ret i1024 [[R]]
;
%i = fptosi double %x to i1025
%r = trunc i1025 %i to i1024
ret i1024 %r
}

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