747c6a0c73
This is the codegen equivalent of D124692. As shown in https://github.com/llvm/llvm-project/issues/55150 - the existing fold may be wrong when converting to a signed value. This is a quick fix to avoid the miscompile. https://alive2.llvm.org/ce/z/KtaDmd Differential Revision: https://reviews.llvm.org/D124771
99 lines
2.3 KiB
LLVM
99 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=aarch64-- < %s | FileCheck %s
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define i32 @s32_f32_s24_s32(i32 %a) {
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; CHECK-LABEL: s32_f32_s24_s32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: sbfx w0, w0, #0, #24
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; CHECK-NEXT: ret
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%f = sitofp i32 %a to float
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%i = fptosi float %f to i24
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%r = sext i24 %i to i32
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ret i32 %r
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}
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define i32 @s32_f32_u24_u32(i32 %a) {
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; CHECK-LABEL: s32_f32_u24_u32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: and w0, w0, #0xffffff
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; CHECK-NEXT: ret
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%f = sitofp i32 %a to float
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%i = fptoui float %f to i24
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%r = zext i24 %i to i32
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ret i32 %r
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}
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define i32 @u32_f32_s24_s32(i32 %a) {
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; CHECK-LABEL: u32_f32_s24_s32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: sbfx w0, w0, #0, #24
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; CHECK-NEXT: ret
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%f = uitofp i32 %a to float
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%i = fptosi float %f to i24
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%r = sext i24 %i to i32
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ret i32 %r
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}
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define i32 @u32_f32_u24_u32(i32 %a) {
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; CHECK-LABEL: u32_f32_u24_u32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: and w0, w0, #0xffffff
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; CHECK-NEXT: ret
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%f = uitofp i32 %a to float
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%i = fptoui float %f to i24
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%r = zext i24 %i to i32
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ret i32 %r
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}
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; This requires converting to FP and back.
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define i32 @s32_f32_s25_s32(i32 %a) {
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; CHECK-LABEL: s32_f32_s25_s32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: scvtf s0, w0
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; CHECK-NEXT: fcvtzs w0, s0
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; CHECK-NEXT: ret
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%f = sitofp i32 %a to float
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%i = fptosi float %f to i25
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%r = sext i25 %i to i32
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ret i32 %r
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}
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define i32 @s32_f32_u25_u32(i32 %a) {
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; CHECK-LABEL: s32_f32_u25_u32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: scvtf s0, w0
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; CHECK-NEXT: fcvtzs w0, s0
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; CHECK-NEXT: ret
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%f = sitofp i32 %a to float
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%i = fptoui float %f to i25
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%r = zext i25 %i to i32
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ret i32 %r
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}
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; TODO: This could avoid converting to FP.
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define i32 @u32_f32_s25_s32(i32 %a) {
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; CHECK-LABEL: u32_f32_s25_s32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ucvtf s0, w0
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; CHECK-NEXT: fcvtzs w0, s0
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; CHECK-NEXT: ret
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%f = uitofp i32 %a to float
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%i = fptosi float %f to i25
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%r = sext i25 %i to i32
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ret i32 %r
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}
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define i32 @u32_f32_u25_u32(i32 %a) {
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; CHECK-LABEL: u32_f32_u25_u32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ucvtf s0, w0
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; CHECK-NEXT: fcvtzs w0, s0
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; CHECK-NEXT: ret
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%f = uitofp i32 %a to float
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%i = fptoui float %f to i25
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%r = zext i25 %i to i32
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ret i32 %r
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}
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