File: overflow-intrinsic-optimizations.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (28 lines) | stat: -rw-r--r-- 1,015 bytes parent folder | download | duplicates (7) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
; RUN: llc %s -mtriple=sparc -o - | FileCheck %s
; RUN: llc %s -mtriple=sparc64 -o - | FileCheck %s
declare { i128, i1 } @llvm.smul.with.overflow.i128(i128, i128)
declare { i64, i1 } @llvm.smul.with.overflow.i64(i64, i64)

define i32 @mul(i128 %a, i128 %b, ptr %r) {
; CHECK-LABEL: mul
; CHECK-NOT: call __muloti4
  %mul4 = tail call { i128, i1 } @llvm.smul.with.overflow.i128(i128 %a, i128 %b)
  %mul.val = extractvalue { i128, i1 } %mul4, 0
  %mul.ov = extractvalue { i128, i1 } %mul4, 1
  %mul.not.ov = xor i1 %mul.ov, true
  store i128 %mul.val, ptr %r, align 16
  %conv = zext i1 %mul.not.ov to i32
  ret i32 %conv
}

define i32 @mul2(i64 %a, i64 %b, ptr %r) {
; CHECK-LABEL: mul2
; CHECK-NOT: call __mulodi4
  %mul4 = tail call { i64, i1 } @llvm.smul.with.overflow.i64(i64 %a, i64 %b)
  %mul.val = extractvalue { i64, i1 } %mul4, 0
  %mul.ov = extractvalue { i64, i1 } %mul4, 1
  %mul.not.ov = xor i1 %mul.ov, true
  store i64 %mul.val, ptr %r, align 16
  %conv = zext i1 %mul.not.ov to i32
  ret i32 %conv
}