959448fbd6
…ntElimination ArgumentPromotion and DeadArgumentElimination passes could change function signatures but the function name remains the same as before the transformation. This makes it hard for tracing with bpf programs where user tends to use function signature in the source. See discussion [1] for details. This patch added suffix to functions whose signatures are changed. The suffix lets users know that function signature has changed and they need to impact the IR or binary to find modified signature before tracing those functions. The suffix for ArgumentPromotion is ".argprom" and the suffixes for DeadArgumentElimination are ".argelim" and ".retelim". The suffix also gives user hints about what kind of transformation has been done. With this patch, I built a recent linux kernel with full LTO enabled. I got 4 functions with only argpromotion like ``` set_track_update.argelim.argprom pmd_trans_huge_lock.argprom ... ``` I got 1058 functions with only deadargelim like ``` process_bit0.argelim pci_io_ecs_init.argelim ... ``` I got 3 functions with both argpromotion and deadargelim ``` set_track_update.argelim.argprom zero_pud_populate.argelim.argprom zero_pmd_populate.argelim.argprom ``` [1] https://github.com/llvm/llvm-project/issues/104678
43 lines
1.8 KiB
LLVM
43 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
|
|
; RUN: opt -passes=argpromotion -S %s | FileCheck %s
|
|
|
|
%struct.A = type { float, [12 x i8], i64, [8 x i8] }
|
|
|
|
define internal float @callee(ptr byval(%struct.A) align 32 %0) {
|
|
; CHECK-LABEL: define {{[^@]+}}@callee.argprom
|
|
; CHECK-SAME: (float [[DOT0_VAL:%.*]], i64 [[DOT16_VAL:%.*]]) {
|
|
; CHECK-NEXT: [[TMP1:%.*]] = fadd float 0.000000e+00, [[DOT0_VAL]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = uitofp i64 [[DOT16_VAL]] to float
|
|
; CHECK-NEXT: [[TMP3:%.*]] = fmul float [[TMP1]], [[TMP2]]
|
|
; CHECK-NEXT: ret float [[TMP3]]
|
|
;
|
|
%2 = load float, ptr %0, align 32
|
|
%3 = fadd float 0.000000e+00, %2
|
|
%4 = getelementptr inbounds %struct.A, ptr %0, i32 0, i32 2
|
|
%5 = load i64, ptr %4, align 16
|
|
%6 = uitofp i64 %5 to float
|
|
%7 = fmul float %3, %6
|
|
ret float %7
|
|
}
|
|
|
|
define float @caller(float %0) {
|
|
; CHECK-LABEL: define {{[^@]+}}@caller
|
|
; CHECK-SAME: (float [[TMP0:%.*]]) {
|
|
; CHECK-NEXT: [[TMP2:%.*]] = alloca [[STRUCT_A:%.*]], align 32
|
|
; CHECK-NEXT: store float [[TMP0]], ptr [[TMP2]], align 32
|
|
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [[STRUCT_A]], ptr [[TMP2]], i32 0, i32 2
|
|
; CHECK-NEXT: store i64 2, ptr [[TMP3]], align 16
|
|
; CHECK-NEXT: [[DOTVAL:%.*]] = load float, ptr [[TMP2]], align 32
|
|
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr i8, ptr [[TMP2]], i64 16
|
|
; CHECK-NEXT: [[DOTVAL1:%.*]] = load i64, ptr [[TMP4]], align 16
|
|
; CHECK-NEXT: [[TMP5:%.*]] = call noundef float @callee.argprom(float [[DOTVAL]], i64 [[DOTVAL1]])
|
|
; CHECK-NEXT: ret float [[TMP5]]
|
|
;
|
|
%2 = alloca %struct.A, align 32
|
|
store float %0, ptr %2, align 32
|
|
%3 = getelementptr inbounds %struct.A, ptr %2, i32 0, i32 2
|
|
store i64 2, ptr %3, align 16
|
|
%4 = call noundef float @callee(ptr byval(%struct.A) align 32 %2)
|
|
ret float %4
|
|
}
|