fallback: legalize: G_INTRINSIC_W_SIDE

fallback: legalize: G_INTRINSIC_W_SIDE_EFFECTS s64,p0

Run:	main-bc8218b282-20261015-074651
Kind:	fallback
Category:	legalize: G_INTRINSIC_W_SIDE_EFFECTS s64,p0
Occurrences:	4 in 1 configs, 1 test files
Snippet from:	rv64-stackmap.ll @propertyRead via llvm-extract
Config:	`-mtriple=riscv64`
Local check:	reproduces at bc8218b282
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

define i64 @propertyRead(ptr %obj) {
entry:
  %resolveRead = inttoptr i64 244837814094590 to ptr
  %result = call anyregcc i64 (i64, i32, ptr, i32, ...) @llvm.experimental.patchpoint.i64(i64 5, i32 28, ptr %resolveRead, i32 1, ptr %obj)
  %add = add i64 %result, 3
  ret i64 %add
}

declare i64 @llvm.experimental.patchpoint.i64(i64 immarg, i32 immarg, ptr, i32 immarg, ...)

Reproduce:

llc -mtriple=riscv64 -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: %3:_(s64) = G_INTRINSIC_W_SIDE_EFFECTS intrinsic(@llvm.experimental.patchpoint), 5, 28, %2:_(p0), 1, %0:_(p0) (in function: propertyRead)
warning: Instruction selection used fallback path for propertyRead

Occurrences (4):

Input	Function	Config
rv64-stackmap.ll	propertyRead	`-mtriple=riscv64`
rv64-stackmap.ll	jsIntCall	`-mtriple=riscv64`
rv64-stackmap.96621564c1.ll (mutant of rv64-stackmap.ll)	propertyRead	`-mtriple=riscv64`
rv64-stackmap.96621564c1.ll (mutant of rv64-stackmap.ll)	jsIntCall	`-mtriple=riscv64`

Generated 2026-10-15 08:05 UTC.