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[SystemZ] Avoid trunc(add(X,X)) patterns #164378

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Oct 21, 2025
Merged

[SystemZ] Avoid trunc(add(X,X)) patterns #164378

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45 changes: 25 additions & 20 deletions llvm/test/CodeGen/SystemZ/int-conv-14.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -55,14 +55,15 @@ define i128 @f4(ptr %ptr) {
}

; Truncation to i64.
define i64 @f5(i128 %a) {
define i64 @f5(i128 %a, i128 %b) {
; CHECK-LABEL: f5:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvg %r2, %v0, 1
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i64
ret i64 %res
}
Expand Down Expand Up @@ -134,15 +135,16 @@ define i128 @f10(ptr %ptr) {
}

; Truncation to i32.
define i32 @f11(i128 %a) {
define i32 @f11(i128 %a, i128 %b) {
; CHECK-LABEL: f11:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i32
ret i32 %res
}
Expand Down Expand Up @@ -215,15 +217,16 @@ define i128 @f16(ptr %ptr) {
}

; Truncation to i16.
define i16 @f17(i128 %a) {
define i16 @f17(i128 %a, i128 %b) {
; CHECK-LABEL: f17:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i16
ret i16 %res
}
Expand Down Expand Up @@ -296,15 +299,16 @@ define i128 @f22(ptr %ptr) {
}

; Truncation to i8.
define i8 @f23(i128 %a) {
define i8 @f23(i128 %a, i128 %b) {
; CHECK-LABEL: f23:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i8
ret i8 %res
}
Expand Down Expand Up @@ -385,15 +389,16 @@ define i128 @f28(ptr %ptr) {
}

; Truncation to i1.
define i1 @f29(i128 %a) {
define i1 @f29(i128 %a, i128 %b) {
; CHECK-LABEL: f29:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i1
ret i1 %res
}
Expand Down
45 changes: 25 additions & 20 deletions llvm/test/CodeGen/SystemZ/int-conv-15.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -55,14 +55,15 @@ define i128 @f4(ptr %ptr) {
}

; Truncation to i64.
define i64 @f5(i128 %a) {
define i64 @f5(i128 %a, i128 %b) {
; CHECK-LABEL: f5:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvg %r2, %v0, 1
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i64
ret i64 %res
}
Expand Down Expand Up @@ -134,15 +135,16 @@ define i128 @f10(ptr %ptr) {
}

; Truncation to i32.
define i32 @f11(i128 %a) {
define i32 @f11(i128 %a, i128 %b) {
; CHECK-LABEL: f11:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i32
ret i32 %res
}
Expand Down Expand Up @@ -215,15 +217,16 @@ define i128 @f16(ptr %ptr) {
}

; Truncation to i16.
define i16 @f17(i128 %a) {
define i16 @f17(i128 %a, i128 %b) {
; CHECK-LABEL: f17:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i16
ret i16 %res
}
Expand Down Expand Up @@ -296,15 +299,16 @@ define i128 @f22(ptr %ptr) {
}

; Truncation to i8.
define i8 @f23(i128 %a) {
define i8 @f23(i128 %a, i128 %b) {
; CHECK-LABEL: f23:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i8
ret i8 %res
}
Expand Down Expand Up @@ -383,15 +387,16 @@ define i128 @f28(ptr %ptr) {
}

; Truncation to i1.
define i1 @f29(i128 %a) {
define i1 @f29(i128 %a, i128 %b) {
; CHECK-LABEL: f29:
; CHECK: # %bb.0:
; CHECK-NEXT: vl %v0, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v0, %v0
; CHECK-NEXT: vl %v0, 0(%r3), 3
; CHECK-NEXT: vl %v1, 0(%r2), 3
; CHECK-NEXT: vaq %v0, %v1, %v0
; CHECK-NEXT: vlgvf %r2, %v0, 3
; CHECK-NEXT: # kill: def $r2l killed $r2l killed $r2d
; CHECK-NEXT: br %r14
%op = add i128 %a, %a
%op = add i128 %a, %b
%res = trunc i128 %op to i1
ret i1 %res
}
Expand Down
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